Aluminum Surface-Mount 4-Door USPS Vertical Mailbox

A durable, USPS-approved vertical mailbox designed for retrofit and replacement installations in apartments, condos, and commercial buildings. Made entirely of aluminum with a powder-coated finish, this surface-mounted unit features four secure tenant compartments and a carrier access door for USPS master lock.

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Key Features:

• USPS Approved 4B Compliance: Meets USPS-STD-4B for retrofit and replacement installations
• All-Aluminum Construction: Lightweight, corrosion-resistant body with durable powder-coated finish
• Secure Tenant Access: Each door includes a 5-pin cylinder cam lock and two keys
• Easy Surface Mounting: Attaches directly to flat walls; back panel accepts mounting hardware (not included)
• Scratch-Resistant Design: Striated doors and trim help minimize visible wear

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Series	Salsbury 3500 Series 4B vertical mailboxes
Mounting Type	Surface mounted (through back panel)
Doors / Compartments	4 tenant doors
Overall Dimensions	24.25" W x 19" H x 7.5" D
Individual Compartment Size	5.5" W x 16.25" H x 6.75" D
Material	All aluminum construction
Finish	Durable powder coated (aluminum, bronze, sandstone options)
Locks	5-pin cylinder cam locks; two keys per door
USPS Compliance	USPS-STD-4B approved for replacement/retrofit installations
Door/Trim Feature	Striated to resist scratching
Options	Custom engraved placards; outgoing mail slot 4.75" W x 0.5" H; replacement locks; additional keys; key blanks

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Frequently Asked Questions (FAQ):

Q: Is this mailbox approved for USPS mail delivery?
A: Yes, it meets USPS-STD-4B requirements and includes a carrier access door for a USPS-provided master arrow lock.

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Q: How is the unit installed?
A: It mounts directly to a flat wall surface and is secured through the back panel with mounting hardware (not included).

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Q: What are the overall and compartment dimensions?
A: Overall: 24.25" W x 19" H x 7.5" D. Each compartment: 5.5" W x 16.25" H x 6.75" D.

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Q: How many doors and keys are included?
A: Four tenant doors; each door includes a 5-pin cam lock with two keys.

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Q: Can I add door numbers or labels?
A: Yes, optional custom engraved placards are available for door numbering.

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Streamlined Mail Management with Architectural Poise

This vertical mailbox brings a refined, functional rhythm to multifamily corridors with its striated aluminum face and crisp, surface-mounted frame. The powder-coated finish and clean lines feel modern yet timeless, composing a quiet symmetry across four tenant doors. Style it with custom numbered placards for a tailored, boutique-building look. It’s a chic, practical essential that elevates everyday mail service with effortless luxury.

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Upgrade your building’s mail system with this USPS-approved, all-aluminum 4-door vertical mailbox—secure, stylish, and ready to mount.

Installation