Vertical Mailboxes. Column Mailboxes. 00 $369. For more product info contact the National Mailboxes Customer Support Center at 1-800-676-5161. All installation is done by licensed and insured installers. The box needs to be big enough to accommodate your daily mail. The United States Postal Service (USPS) has rules regarding the use of mailboxes, but that doesn't necessarily mean they prohibit the use wall-mounted mailboxes. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C. Depending on your centralized delivery post box location, your horizontal apartment units can be mounted on a wall, recessed, or free-standing on a pedestal (CBUs). 2 pounds. 5. Wall Mount Gray Metal Large Lockable Mailbox. Modular designs with nearly 150 base modules. The new, USPS-approved 4C series of mailboxes contain multiple horizontal customer compartments in one cabinet. Model # CBU-8. The Benefits of Your 16 Unit Outdoor Cluster Mailbox. Architectural Mailboxes. 4B VERTICAL MAILBOXES. National Mailboxes’ new high security 4C mailboxes provide a simple, easy to use, pre-configured product line of mailboxes and parcel lockers. Salsbury Victorian Mailbox – Surface Mounted. Others come with locks if security and mail theft are issues. S. Specializing in high security mailboxes both USPS approved for U. What to Know About Mailboxes Before Shopping . Mail Boss Olympus Drop Box High Security Locking Wall Mount MailBoss by Epoch Design. Salsbury 3506RU 6 Door Vertical Mailbox Finish Recessed Mounted USPS Access. The Postal Service annually publishes a list of USPS-approved mailbox equipment and approved manufacturers in its Postal Bulletin. Overall Pick. French Villa-Inspired Mailbox: Lametr French Villa Mailbox. They only get better with age because they are made from natural brass with no coating or finish over them, just a polished. The USPS-4C Standard includes the following specifications: A minimum size requirement for mailboxes (12” W x 3” H x 15” D). All mailboxes must meet USPS installation regulations to ensure your mail is. Made with galvanized steel, this USPS-approved mailbox has an anti-pry lock, magnetic doors. 16 Door USPS Approved Cluster Mailbox. Mix and match free-standing outdoor pedestal-mounted mailboxes or recess wall mounted indoor vertical/horizontal mailboxes to supply seamless USPS delivery or private internal. com home of National Mailboxes, a division of NMHP Inc. These (USPS Approved) high security type Cluster Mailboxes are outdoor rated and weather resistant and weather-proof. Gibraltar Solar Townhouse Wall-Mounted Mailbox. This smooth aluminum collar ensures the mail system achieves that desired sleek, finished look while easily attaching directly. New High Security 4C Series. 4C Horizontal mailboxes are designed to ensure that a maximum number of USPS compliant tenant compartments are available within the given. 00 $ 229. S mail delivery and. Post Mounted Mailboxes. When it comes to commercial mailboxes for sale in Arizona, you won’t find better selection, service—or prices—anywhere else. Product Details: Vertical mailbox with 4 doors, front load, surface mounted. Each unit locks, allowing each customer to access mail at their convenience. the RIGHT mailbox. Aggressive dogs, children’s toys in the walkway, an icy walkway, and other obstructions must be avoided. 8"x4. They are USPS approved and are available with front and rear loading compartments. 00 Free Shipping. Doors: 29 usable “A” size doors. $ 269. For those looking for a stylish, secure wall-mount mailbox that can hold a lot of mail, we like the vintage-inspired Tooluck Large-Capacity Locking Wall-Mount Mailbox as a decorative, door-side focal point. S. 4C Mailbox with 20. 5. SKU: 3506RU. $1,999. Our stainless wall mailboxes come in a variety of styles, shapes, and sizes and can be purchased with post options or can be mounted directly to a wall or flat surface. Approved for private use and USPS delivery, our manufacturers build outdoor commercial mailboxes to meet USPS size and construction standards. 1400 Series Front Loading Horizontal Mailbox with Master Access Door and 27 Compartments. Weight: 25 lbs. 12 Door USPS Approved Cluster Mailbox. Florence Corporation manufactures all mailboxes in the USA and meets the ARRA “Buy American” requirements as outlined in Section 1605. Wall Mount Mailbox. Mail house residential mailboxes are accessed from the front through a 13″W x 9″H locking door. If it lines up, put a level on top of the post and begin filling the hole with soil. Salsbury Industries offers a wide variety of column mailboxes for brick, stucco or wall enclosures. Our selection of pedestal mounted and cluster outdoor mailboxes are built to USPS standards and resist rain, snow, and more. $461. 99 $97. 50. Wall Mount Mailbox, Large Capacity Mailbox for Outside,Aluminum and Galvanized Steel Rust-Proof Hanging Secured Postbox, Security Key Drop Box,18"x11. Mail is deposited through a non-locking access panel on the front. Commercial USPS Approved Mailboxes in California. They are USPS Approved for replacement only although local post office approval is still required. Architectural Mailboxes 7900-2-R Mapleton Post Mount Mailbox - Graphite. 4B Horizontal Mailboxes. 99 $97. The Benefits of Your 8 Unit Outdoor Cluster Mailbox. With a range of features designed to enhance security, convenience, and durability, the 8-unit cluster box offers numerous benefits for property. The post (which must be no bigger than 4 x 4) must be buried between 12-24 inches in. $18. Model # 4615. It is ideal for small business owners who. Get free shipping on qualified Wall Mount, Locking Mailboxes products or Buy Online Pick Up in Store today in the Hardware Department. Postal Service STD-4C compliant mailbox systems. Size: Small. The NEW line of 4C Horizontal Wall Mount mailboxes at National Mailboxes are perfect for apartments and multi-tenant buildings. Model # CBU-12. $2,859. Cast Aluminum – Locking mailboxes are made of die cast aluminum and feature a solid brass mail flap and a locking eagle or plain door. Commercial Mailboxes. 25—PALMER — Confusion over a U. Approved for USPS residential door mail delivery. Mail Boss Triple Mail Manager Locking Mailbox & Post MailBoss by Epoch Design. Column Mailboxes are available in locking and non-locking styles. Local: 262-782-6510 Toll Free: 800-571-0147 Mailboxes used in new construction projects can be one of the following two types of centralized mailbox equipment: Pedestal-mounted USPS-approved CBU. Model # 1570-16V. Wall. 4 x 11. 00 (20%) Add to Cart. USPS Approved and Postal Certified for US Mail Delivery. Recycling/Trash. USPS approved, it’s perfect for any office building, residence hall, apartment or condo complex, and more! Local: 262-782-6510 Toll Free: 800-571-0147. $2,249. These units can come as freestanding, wall-mounted, or recessed models. 50 View Options Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Wall Mounted Mailboxes are designed to be mounted on walls, doors and other flat surfaces and are available in locking and non-locking styles. While some rules apply to all mailboxes in general, there are separate, specific regulations for locking, package or. The Townhouse Locking wall mount mailbox is constructed from galvanized steel and features a concealed cam lock with 2 keys. The United States Postal Service (USPS) has rules regarding the use of mailboxes, but that doesn't necessarily mean they prohibit the use wall-mounted mailboxes. We provide parts for curbside, centralized, wall-mounted, and other types of mailboxes as well as accessories meant to keep any property appealing for years to come. With a durable powder coat finish, the Townhouse keeps its good looks and your mail stays safe. This wall mounted residential single family mailbox features an incoming slot that can accept larger mail such as magazines, priority envelopes, DVDs, video tapes, and bank check boxes. Rugged, weather-resistant powder coat finish in six. com offerings feature three main styles of residential mailboxes: . The NEW line of 4C Horizontal Wall Mount mailboxes at National Mailboxes are perfect for apartments and multi-tenant buildings. We are the leader in providing high quality collection mailboxes in the United States. Our standard letter locker mailboxes are USPS Approved and Postal Certified and do not require the USPS Postal Arrow Lock. Surface Mounted units are designed to be mounted on a wall or other flat surface. We also provide replacement parts for every type of mailbox, and these range from doors, locks, posts, and more. One piece Vertical Mail Slots (H4085) come spring loaded. Mailbox includes surface mount collar for flush wall mounting. Ensure that the flap if working properly and allows delivery. This wall-mount mailbox comes fully assembled. USPS Approved Drop Boxes. at 1-888-352-9194 or click here. They only get better with age because they are made from natural brass with no coating or finish over them, just a. FAQs Request a Quote Contact. 3 USPS-Approved Mailbox Equipment Mailboxes used in new construction projects can be one of the following two types of centralized mailbox equipment: 1. Mail Supply offers residential mailboxes that meet the needs of contemporary American lifestyles. 00 Free Shipping. Patent pending and theft resistant pull down hopper door allows for safe mail deposit. com, we offer high-quality, innovative, and USPS-approved mailboxes. Our 3300 series meets U. The 4C Horizontal Wall Mount Collection/Drop Boxes from National Mailboxes is the perfect solution for your outgoing mail collection needs. USPS approved locking mailboxes from US Mail Supply are available in a wide variety of styles and finishes. National Mailboxes’ new high security 4C mailboxes provide a simple, easy to use, pre-configured product line of mailboxes and parcel lockers. Choose from a wide range of designs and sizes to fit any architectural style from Gaines Manufacturing,. Decorative wall-mounted and column mailboxes are offered in different colors and styles to match all luxury homes in residential areas. It has front-load access, is USPS-approved, and weighs only 6. Find the right USPS-approved residential mailbox online for your property. They are approved by the USPS for residential mail delivery. Vary in height and mounting options. P. Replace your small mailbox 1 with a new package-friendly mailbox big enough for all your mail, too. 13 Door CBU's. S. The USPS does not govern wall mount mailboxes, although the product must operate easily and have longevity similar to curbside mailboxes. Quick view. Its heavy-duty construction made from 14-gauge and 16-gauge galvanized welded steel provides this top-tier security. We even have vertical options, like the Salsbury 3503RP and 3308-P, for small properties. Our Horizontal Mailboxes are high quality, very secure, and made from heavy duty aluminum for lasting durability. Or perhaps you’re familiar with this mailbox type, and you’re wondering where your key is for your compartment, and how to get one. They are the easiest types to install and work well in suburbs and rural settings. Unit Size: 33-7/8″W x 33-5/8″H x 17″D. It has ample space for letters, bills, and advertisements. 1-48 of 168 results for "locking mailbox usps approved" Results Price and other details may vary based on product size and color. New single-family homes and rental properties will need safe and attractive mailboxes. Our residential mailbox product line. $2,749. Mail Boss’s 7506 Curbside Locking Security Mailbox offers one of the more secure designs among all our choices. 00 Free Shipping. $2,599. 00 Free Shipping. We manufacture, supply, and distribute a wide selection of residential mailboxes, both indoor and outdoor models, to residential home owners and home. These mail receptacles are installed right outside the structure’s front door or in another convenient location on an exterior wall. 95 $627. Surface mounting requires the purchase of the surface mount collar – see product #SM06S; CUSTOM 4C MAILBOX QUOTE. All mailbox dimensions and designs must be approved by the Postmaster General (PMG) before it can be sold. They are front loading style and include parcel locker compartments for packages, an outgoing mail compartment for outgoing mail and pedestal stands for mounting. There are two keys for each lock, an option for engraved door identification, and clear plastic slots for each door. Fit More in Your Extra-Large Mailbox. 5” deep. Mail Boss 7506 Curbside Locking Security Mailbox. Unit Size: 21″W x 28-1/4″H x 17″D. Constructed and Manufactured of Heavy Duty Extruded. Mail Supply offers USPS-approved commercial mailboxes and commercial mailboxes for private delivery to give you versatile options for public and internal deliveries. This front-loading unit features 10 tenant doors and 2 parcel lockers. 00 $735. All installation is done by licensed and insured installers. With a range of features designed to enhance security, convenience, and durability, the 16-unit cluster box offers numerous benefits for property. Wall-mounted USPS-approved STD-4C mailboxes (4C). 99 $ 109. They have increased in popularity due to all of the benefits that come with them. Model # CBU-8. Patented anti-pry latch to prevent leveraged entry on every mailbox, Postmaster General Approved MailBoss. Mail Boss 7506 Curbside Locking Security Mailbox. 2. The USPS has a specific mailbox size limit. 95 $627. The NEW line of 4C Wall mount mailboxes at National Mailboxes are perfect for apartments and multi-tenant buildings. Wall-Mounted: $100 to $300 for 2-6 boxes and $455 to $1,200 for larger units; Post-Mounted: $375 to $1,850, Surface. They’re mounted on a post and have a convenient opening for the mail carrier to deposit mail curbside. You may purchase single units for private delivery or several standard units. Versatile Front Loading Single Column Mailbox Collection Drop Box with Pull Down Hopper - 4C16S-HOP. Aluminum Surface-Mounted USPS Access Vertical Mailbox with 5 Doors. 161. 8 Door USPS Approved Cluster Mailbox. 00 $2,079. 120. Residential Grade Courtyard Outdoor Post Light Package - LED. FAQs Request a Quote Contact. 6510 for more information on which mailbox is right for you. 62 $78. Residential USPS Approved Mailboxes in Texas. The New 4C Wall Mount Collection Drop Boxes from National Mailboxes are ideal for all your individual or business collection needs. 06 inches high. The Postal Service annually publishes a list of USPS-approved mailbox equipment and approved NEW High Security Cluster Box Units (CBUs) F-Series Type (USPS Approved) 16 Tenant Door Standard Style High Security CBU Mailbox with 2 Parcel Lockers (Pedestal Included) – Type 3 USPS Approved – H1570-16AF. Curbside mailboxes must be 6-8 inches back from the curb. We carry residential post mailboxes, indoor mailboxes, wall mounted residential mailboxes, and everything inbetween. Commercial Mailboxes. Effective October 5, 2006, all new designs approved for NEW CONSTRUCTION AND MAJOR RENOVATION require U. The box alone measures 21. The Freestanding Depot Enclosure with 4C Horizontal Mailbox from National Mailboxes provides the perfect solution for your stand-alone installation needs. $3,028. Product Line Features: Approved for USPS residential door mail delivery. Courtyard Decorative Brass Recessed In-Wall Mount Residential Locking Mailbox (USPS Approved) – HSI-176L Wholesale Pricing $ 700. The standardization of mailboxes helps to ensure the safety of mail carriers and the items they deliver. USPS Approved for wall-mounted applications only; It is strongly recommended that. With many different door configurations and number of tenant door models available to choose from, National Mailboxes prides itself for being the North American leader for both residential style and commercial style durable and. Available in (6) contemporary colors and optional decorative top and pedestal. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. The address must be on the same side as the flag or on the front of the mailbox. Choose from mailboxes with 16 to 29 tenant doors that meet or exceed all security requirements of the USPS STD-4C regulation for wall-mounted mail receptacles. Tags: post mount mailboxes, Wall Mount Mailboxes. 00 Free Shipping. Each model is available in two door designs:. They contain 8, 12, 13, or 16 individually locked mailboxes and parcel compartments. They come standard in Anodized Aluminum or in a variety of stylish colors to fit your decor. Gibraltar Mailboxes. 00 out of 5. W x 16-1/2 in. Such as suggestion slips, ballots, mail, documents, keys, money and more. Product Line Features: Manufactured here in the U. The units range in size from eight to 30 doors, so you get a heavy-duty mailbox that fits your facility. November 25, 2023 at 6:04 PM · 8 min read. Courtyard Decorative Brass Recessed In-Wall Mount Residential Mailbox (USPS Approved) – HSI-176 Wholesale Pricing $ 575. S. approved H4300 series Mail Package Drops feature both a front and rear access locking door. 00 Free Shipping. Or, if direct USPS pickup is needed, there are models that are USPS-approved as well. Availability: In stock. Ensure that the flap if working properly and allows delivery. View Options. USPS Approved Commercial & Community Mailboxes. Mail Slots. If you need a large or specialized order, such as for college dorms, hospital patients, or nursing home residents, please call us at (866) 707-0008. 4C Horizontal mailboxes are designed to ensure that a. Wholesale Pricing $ 1,808. Find My Store. CBUs. $2,699. This USPS Approved Delivery Vault comes equipped With a Full Service Locking Letterbox, a unique security drop door mechanism (U. Aluminum Recessed-Mounted USPS Access Vertical Mailbox with 6 Doors. Wall Mount Type Residential Mailboxes have been a very popular product line and specialty offered by National. By offering different suite height options,. 5 out of 5 Stars. Rustic Mailbox Amish Handmade Wooden Rustic Reclaimed Lumber With Metal insert USPS Approved (574) $ 154. They must be no higher than 45 inches tall, and the door must be between 41 and 45 inches off the street surface. 97 out of 5 based on 63 customer ratings. A parcel locker requirement based on a. US Mailboxes is committed to continuing the values of maintaining a high quality service in a prompt and timely manner. Consequently, homeowners and renters have boxes mounted to the house, usually by a porch or entrance. Best Seller Save. Tenant keys come with the units that you order. Shop wall-mounted 4C commercial Mailboxes for sale from U. 16 Tenant Door Standard Style High Security CBU Mailbox with 2 Parcel Lockers (Pedestal Included) – Type 3 USPS Approved – H1570-16AF. 6, 2006, is approved for replacement. Front Loading Commercial Mailbox with 19 Tenant Compartments and 2 Parcel Lockers - Versatile. 6’’. Shop commerical mailboxes. $1,600. Rated 4. 4C mailboxes are USPS Approved and meet or exceed STD-4C requirements for new construction. $5899. 97 Free Shipping. Options for USPS approved indoor & outdoor mailboxes include: Cluster Mailboxes 4C Horizontal Mailboxes 4B Horizontal Mailboxes Vertical Mailboxes Locking Mailboxes. The NEW line of 4C Horizontal Wall Mount mailboxes at National Mailboxes are perfect for apartments and multi-tenant buildings. Horizontal 4C mailboxes are USPS approved (STD-4C) and 4C depot style mailboxes are for private deliveries only. $3,259. USPS Approved Commercial, Apartment, & Residential Units The U. Tenant Compartment Size: 5-1/2″W x 16″H x 6″D. Post Mount Mailboxes. Mail Slots - USPS Approved Home / Residential Mailboxes – USPS Approved / Wall Mount Type Residential Mailboxes - USPS Approved / Mail Slots - USPS Approved. They can contain eight, twelve, thirteen, or sixteen individual, locked mailboxes and parcel compartments. Also, don’t forget to check out some of our most popular products. 4C Horizontal commercial mailboxes are designed to ensure. When it comes to placement, mailbox supports should be around 41 to 45 inches away from the road and about 6 to 8 inches back from the curb. Providing USPS Approved Washington Residential Mailboxes. Choose from a variety of mailbox sizes and styles; mounted mailboxes are not required to have a PMG seal of approval. S. 50 View Options. NEW High Security 4C Parcel Lockers Wall Mount – USPS Approved For Packages Only (19) In-Wall Mounted Parcel Lockers for Standard Horizontal Mailboxes – For Packages Only. 4. Townhouse Wall Mount Mailboxes are conveniently accessed from the top through a 15″W x 4-1/2″D opening. Modern Large Locking Mailbox. Striated doors to resist scratching. Residential Apartment Mailboxes. LAND·VOI Locking Mailbox with 4 Keys, Wall Mounted Metal Postbox，Nameplate, Newspaper Holder, Easy to Install, 3. 00. Designer Black with Satin Nickel, Medium, Steel, Locking, Wall Mount Mailbox (460) $ 32. Our residential mailbox product line covers wall-mounted, post-mounted, and column-mounted mailboxes all with a variety of decorative options. Available in four attractive colors including Black, Green, Beige, and White. $ 205. FREE delivery Wed, Nov 1 on $35 of items shipped by Amazon. Showing all 2 results. U. (286) Sale Price $115. Corrosion resistant and rust proof providing decades of durability and long life. FREE Returns . Phone: Call (866) 707-0008. Choose from mailboxes that meet or exceed all security requirements of the USPS STD-4C regulation for wall-mounted mail receptacles. 1400 Series Horizontal Front Loading Mailboxes - 20 Tenant Doors And 1 USPS Master Door. H x 6 in. Commercial Mailboxes. We manufacture, supply, and distribute a wide selection of residential mailboxes, both indoor and outdoor models, to residential home owners and home owners associations across the country. Here, you can purchase or request a quote for USPS-approved, front-loading 4C apartment mailboxes. Made entirely of aluminum, Salsbury 3500 series USPS approved 4B+ vertical mailboxes feature a durable powder coated finish available in three (3) contemporary colors,. com, we offer residential mailboxes that can withstand these conditions. Each unit comes with a 5-pin cam lock with three keys. m. Wall-mounted mailboxes, which simply mount near a front door or above a porch, also have some accessories available. Recessed In-Wall Mount Style or Surface Wall Mount Style Available. US Mail Supply provides USPS approved indoor mailboxes. 97 out of 5. Position your mailbox 41″ to 45″ from the road surface to the bottom of the mailbox or point of mail entry. 00 Free Shipping. $2,849. For more product info contact the National Mailboxes Customer Support Center at 1-800-676-5161. Residential and Commercial Mailboxes (GoMailboxes. 15 (3) Model# 12506SMSHA. 00 out of 5. Shop Package Mailboxes. Floral Tin Mailbox: Creative Co-Op Distressed Embossed Tin Wall-Mounted Mailbox. Letter Lockers The ten-door high four parcel locker 4C versatile™ mailbox from US Mail Supply is available in eight vandal-resistant powder coat finishes: Antique Bronze; Black; Dark Bronze; Gold Speck (shown above) Postal Grey; Sandstone; Silver Speck; White; CUSTOM 4C MAILBOX QUOTE. Surface mounted units mount directly to a wall or other flat surface and are secured with mounting hardware through the back panel. valiant outdoor parcel lockers. approved and come in 4 different heights – 6 door high, 10 door high , 11 door high and Maximum Height units. 987. Many home and business owners have adopted the wall mount design tVertical Commercial Mailboxes (replacement only) For apartment and multi-tenant properties desiring to replace vertical commercial mailboxes, an excellent choice may be the USPS-approved Vertical Mailboxes. Related Searches. These mailboxes are USPS approved and in stock with the manufacturer. Wall-mounted mailboxes used for multi-residential or commercial purposes must meet the USPS guidelines (USPS-STD-4C) which require Standard Parcel Lockers to be 15 inches high by 12 inches wide by 15 inches deep and Large Parcel Locker to be 18 inches high by 12 inches wide x 15 inches deep. Providing USPS Approved Washington Residential Mailboxes. Free-Standing Mailboxes. They can be used for USPS access or for private use/access. 63” x 7. Outgoing Mail Tray Opening: 10″W x 1-3/4″H. Horizontal 4C mailboxes are USPS approved (STD-4C) and 4C depot style mailboxes are for private deliveries only. It signifies that the mailbox meets USPS standards for safe and efficient mail delivery. BudgetMailboxes. Texas USPS-Approved Mailboxes for Homes and Small Business. Column Mailboxes. They can be used for indoor and/or outdoor centralized mail delivery. 13 door CBU’s feature (13) Larger sized locked compartments, (1) parcel box and (1) secure outgoing mail slot. These units can come as freestanding, wall-mounted, or recessed models. The box alone measures 21. Make sure you have everything you need. The NEW line of 4C Wall mount mailboxes at National Mailboxes are perfect for apartments and multi-tenant buildings. Best Seller. 8 Door USPS Approved Cluster Mailbox. USPS approval is a crucial factor to consider when purchasing commercial mailboxes for your business. Constructed and Manufactured of Heavy Duty Extruded Aluminum. Each private access mailbox tenant door is 6-3/8″W x 3″H. Typically, curbside and wall-mounted mailboxes work for homes and small businesses. These units are for indoor. Residential Mailbox Posts (without Mailboxes) Multi-Family Mailbox & Post Combo. They are manufactured of heavy duty die cast aluminum and are available in several durable powder coat finish colors. $109. 3 Inches, Includes Vinyl Mailbox Numbers, Matt Black. By offering different suite height options,. USPS Approved and Postal Certified for All Wall Mount Installations 4C Wall Mount Horizontal Type: Both Recessed In-Wall Mount Style and Surface Wall Mount Style are Available (Optional Surface Mount. They offer secure, space-saving storage with easy access for members. USPS Approved for Replacement of Existing Wall Mounted Mailboxes; Recessed, In-Wall Mount Type; Includes USPS 4B+ Security Upgrade Kit; Tenant Door Size: 5″H x 6-3/8″W x 16″D; Tenant Locks and Keys are Included (Includes 2 Keys per Door or per Lock) Constructed and Manufactured of Heavy Duty Extruded Aluminum 2 Oversized Tenant Doors with 1 Parcel Locker and 1 Outgoing Mail – 4C Wall Mount 6-High Horizontal Mailbox Unit – H4C06D-02. Cluster Box Units (CBU’s) 4C Horizontal Mailboxes. Made entirely of aluminum, Salsbury 3500 series USPS approved 4B+ vertical mailboxes feature a durable powder coated finish available in three (3) contemporary colors, aluminum, bronze and sandstone. $ 2,574. Choose from mailboxes that meet or exceed all security requirements of the USPS STD-4C regulation for wall-mounted mail receptacles. The Post Office defines cluster units as pedestal mounted metal mailboxes. USPS Approved 4C Mailboxes. We provide parts for curbside, centralized, wall-mounted, and other types of mailboxes as well as accessories meant to keep any property appealing for years to come. What to Know About Mailboxes Before Shopping .