Sandstone Recessed USPS Vertical Mailbox, 3 Doors

USPS-approved 4B vertical mailbox by Salsbury Industries, designed for recessed wall installation in multi-tenant buildings. Made entirely of aluminum with a durable sandstone powder-coat finish and three tenant compartments secured by cam locks.

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Key Features:

• USPS Approved 4B Design: Compliant for replacement/retrofit installations in apartments, condos, and commercial buildings
• All-Aluminum Construction: Lightweight, corrosion-resistant body with durable sandstone powder-coated finish
• Secure Tenant Access: Each door includes a 5-pin cylinder cam lock with two keys; center door accepts USPS master arrow lock
• Recessed Mounting: Integrated flanged collar fits rough opening; secure through back or side panels (hardware not included)
• Compact Footprint: Unit size 18.75 in W x 19 in H x 7.5 in D with striated doors to resist scratching

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Series	Salsbury 3500 Series 4B Vertical Mailboxes
Mounting Type	Recessed-mounted with integrated flanged collar
USPS Access	USPS-approved; center door for USPS master arrow lock
Number of Doors	3 compartments
Overall Dimensions	18.75" 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; color: sandstone
Door Features	Striated doors and trim to resist scratching
Locks	5-pin cylinder cam locks with two keys per door
Ideal Applications	Apartments, condominiums, commercial buildings
Rough Opening Guidance	Width 1.5" less than unit, height 1.25" less than unit, depth equal to unit depth
Mounting Hardware	Not included; secure through back or side panels
Optional Accessories	Custom engraved placards; outgoing mail slot; replacement locks; additional keys; key blanks

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Frequently Asked Questions (FAQ):

Q: Is this mailbox approved by the USPS?
A: Yes. It meets USPS-STD-4B for replacement/retrofit installations and includes a carrier access door for a USPS-provided master arrow lock.

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Q: What are the overall dimensions and rough opening?
A: Overall: 18.75" W x 19" H x 7.5" D. Rough opening is 1-1/2" less in width, 1-1/4" less in height, and equal to the unit depth.

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Q: What materials is it made of?
A: The unit is made entirely of aluminum with a durable powder-coated finish.

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Q: How many compartments and how are they secured?
A: Three tenant compartments. Each door has a 5-pin cylinder cam lock with two keys; the center door accepts the USPS arrow lock for mail loading.

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Q: Is mounting hardware included?
A: No. Mounting hardware is not included and should be sourced based on the wall construction.

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Streamlined Sandstone Utility with Architectural Poise

This recessed vertical mailbox delivers a clean, tailored presence that quietly elevates a corridor or lobby. The striated sandstone doors bring subtle texture and light play, while the framed collar reads crisp and architectural. Pair it with warm wood paneling or brushed nickel hardware for a cohesive, modern entry. It’s a refined essential that marries everyday function with polished, enduring style.

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Upgrade your building’s mail center with this secure, USPS-approved recessed mailbox and enjoy durable, space-saving performance.

Installation