3700 Series Recessed 4C Mailbox, 9 Doors + 2 Parcel Lockers

USPS-approved recessed 4C horizontal mailbox constructed from heavy-duty aluminum with stainless steel hardware. This double-column, 10-door-high unit provides nine tenant compartments, two integrated parcel lockers, and an outgoing mail slot—ideal for apartments, commercial buildings, and residential communities.

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Key Features:

• USPS-STD-4C Compliant: Front-loading design with carrier access door for USPS master lock
• Durable Construction: Heavy-duty aluminum with powder-coated finish and stainless steel hardware
• Secure Access: Heavy-duty cam locks with dust/rain shields; individually numbered doors
• Integrated Parcel Lockers: Two lockers meet 1:5 USPS parcel ratio; outgoing mail slot with anti-fish plate
• Modular Configuration: Double-column recessed unit with factory-installed trim and connector kit

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Series	Salsbury 3700 Series 4C Horizontal Mailboxes
Mounting Style	Recessed, front loading
Configuration	Double column, 10-door-high unit
Tenant Compartments	9 MB1-equivalent doors
Parcel Lockers	2 integrated parcel lockers (PL4.5 and PL5 referenced in model family)
Outgoing Mail	Outgoing mail slot with weather protection hood; anti-fish plate
USPS Access	Carrier access door with USPS-provided master arrow lock
Construction	Heavy-duty aluminum with stainless steel hardware
Finish	Durable powder-coated (colors available: aluminum, bronze, gold, sandstone; black shown)
Door Locks	Heavy-duty cam locks; dust/rain shield; 3 keys per door
Dimensions	31.125" W x 37.875" H x 16.5" D
Weight	130 lbs
Compliance	USPS-STD-4C; ADA height compliant units available
Included Trim	Factory installed 3/4" W x 1/4" D trim and solid rear cover
Connector Kit	4C horizontal mailbox connector kit included

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Frequently Asked Questions (FAQ):

Q: Is this mailbox USPS approved?
A: Yes, it is manufactured to USPS-STD-4C specifications and is USPS-approved for front-loading access.

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Q: What are the overall dimensions?
A: 31.125 in W x 37.875 in H x 16.5 in D.

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Q: How many tenant compartments and parcel lockers are included?
A: Nine tenant mail compartments and two fully integrated parcel lockers, plus an outgoing mail slot.

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Q: Can it be used outdoors?
A: Yes. It’s designed for indoor or outdoor use with a durable powder-coated finish.

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Q: What locking mechanism is used?
A: Heavy-duty cam locks are included on doors; USPS installs the master arrow lock for carrier access.

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Streamlined Mailroom Elegance

This recessed mailbox system brings a refined, architectural presence to shared spaces. Its crisp, powder-coated facade and balanced double-column layout create a contemporary rhythm along the wall. Style it within a minimalist lobby clad in stone or concrete to let the numbered doors and sleek hardware read as modern sculpture. A sophisticated essential that blends organization with enduring luxury.

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Upgrade your mailroom with this USPS-approved, secure 4C recessed unit—order today for streamlined delivery and long-lasting performance.

Installation