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home > Salsbury Industries 41 in. H x 31-1/8 in. W Aluminum Front Loading 4C Horizontal Mailbox with 20 MB1 Doors > Salsbury Industries 41 in. H x 31-1/8 in. W Aluminum Front Loading 4C Horizontal Mailbox with 20 MB1 Doors

Salsbury Industries 41 in. H x 31-1/8 in. W Aluminum Front Loading 4C Horizontal Mailbox with 20 MB1 Doors main image 0

Salsbury Industries 41 in. H x 31-1/8 in. W Aluminum Front Loading 4C Horizontal Mailbox with 20 MB1 Doors main image 1

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Salsbury Industries 41 in. H x 31-1/8 in. W Aluminum Front Loading 4C Horizontal Mailbox with 20 MB1 DoorsFront Loading 4C Horizontal Mailbox, 20 MB1 Doors USPS approved recessed mounted 4C horizontal mailbox built from heavy duty aluminum with stainless hardware. Front loading design includes 20 MB1 tenant doors and an outgoing mail compartment, ideal for apartments and commercial buildings. Key Features: USPS Approved: Meets USPS STD 4C for secure mail delivery Durable Construction: Heavy duty aluminum body with stainless steel hardware and powder

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Front-Loading 4C Horizontal Mailbox, 20 MB1 Doors

Name: Salsbury Industries 41 in. H x 31-1/8 in. W Aluminum Front Loading 4C Horizontal Mailbox with 20 MB1 Doors
Brand: it
SKU: 7313509302
Price: 1149.00 USD
Availability: InStock
Rating: 4.7929 (704 reviews)

USPS-approved recessed-mounted 4C horizontal mailbox built from heavy-duty aluminum with stainless hardware. Front-loading design includes 20 MB1 tenant doors and an outgoing mail compartment, ideal for apartments and commercial buildings.

Key Features:

USPS Approved: Meets USPS-STD-4C for secure mail delivery
Durable Construction: Heavy-duty aluminum body with stainless steel hardware and powder-coated finish
Secure Access: Heavy-duty cam locks with dust/rain shields and 3 keys per door
Outgoing Mail Slot: Integrated, labeled compartment with weather protection hood
Recessed Mounting: Factory-installed trim and solid rear cover for clean, flush installation

Please check the Product Data Sheet Here

Specifications Table:

Specification	Details
Mounting Style	Recessed-mounted (front loading)
Overall Dimensions	31.125" W x 41.375" H x 16.5" D
Construction	Heavy-duty aluminum with stainless steel hardware
Finish	Durable powder coat (aluminum, bronze, gold, sandstone options)
Doors	20 MB1 tenant doors (3-1/4" H x 13-1/4" W) with heavy-duty cam locks and 3 keys
Outgoing Mail	Integrated compartment labeled “Outgoing Mail” with 10-3/4" W x 3/4" H slot and weather protection hood
USPS Compliance	Manufactured to USPS-STD-4C; USPS installs master arrow lock on carrier access door
Parcel Locker Guidance	USPS requires minimum 1 parcel locker per 5 tenant compartments; minimum 15" H locker to meet ratio
Trim & Cover	Factory-installed 3/4" W x 1/4" D trim and solid rear cover
ADA	ADA height compliant units available
Series	Salsbury 3700 Series 4C Horizontal Mailboxes

Frequently Asked Questions (FAQ):

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

Q: How many tenant compartments are included?
A: This unit includes 20 MB1 (3-1/4" H x 13-1/4" W) doors plus an outgoing mail compartment.

Q: Can it be installed outdoors?
A: Yes, it is suitable for indoor or outdoor use thanks to its powder-coated, all-aluminum construction.

Q: What mounting style is required?
A: This is a recessed-mounted unit designed to install flush within a wall opening.

Q: Does it come with locks and keys?
A: Each door includes a heavy-duty cam lock and 3 keys; the USPS installs the master arrow lock for carrier access.

Streamlined Mail Management with Architectural Poise

This sleek aluminum mailbox brings order and refinement to multifamily entries and commercial corridors. Its crisp, recessed silhouette and uniform, numbered doors create a modern grid that feels both functional and elevated. Pair it with warm wood paneling or polished concrete to accentuate the powder-coated finish and subtle hardware detailing. A considered essential for sophisticated, high-traffic spaces, it delivers durability with design-forward clarity.

Upgrade your property’s mail center with this USPS-approved, 20-door 4C mailbox—built for durability, security, and a clean recessed installation.

Installation