Free-standing 4C horizontal mailbox with 20 doors and 2 parcel lockers

Heavy-duty, USPS-access free-standing 4C horizontal mailbox from Salsbury’s 3900 Series. Features 20 tenant compartments, two integrated parcel lockers, and an outgoing mail slot in a durable, powder-coated aluminum enclosure for indoor or outdoor installations.

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Key Features:

• USPS Approved 4C System: Front-loading access with carrier master door and outgoing mail slot
• Durable Construction: All-aluminum body with stainless steel hardware and powder-coated finish
• Secure Locking: Heavy-duty cam locks with dust/rain shields; anti-fish plate on mail slot
• Flexible Deployment: Free-standing enclosure ideal where wall-mounting isn’t feasible; indoor or outdoor use
• Compliant Design: Meets 4C requirement of one parcel locker per five compartments; ADA-height options available

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Series	Salsbury 3900 Series
Configuration	Double column, 20 tenant doors with 2 parcel lockers
Loading/Access	Front-loading with carrier master door (USPS arrow lock installed by USPS)
Overall Dimensions	31.75 in W x 72.125 in H x 18.5 in D
Material	Heavy-duty aluminum with stainless steel hardware
Finish	Durable powder coat, color: Black
Door Sizes	MB1 doors: 3-1/4 in H x 12-3/4 in W; other MB sizes available in series
Outgoing Mail	11-3/4 in W x 3/4 in H mail slot with weather protection hood; labeled 'Outgoing Mail'
Security	Heavy-duty cam locks; anti-fish plate on rear of mail slot; dust/rain shield
Use Case	Indoor or outdoor installations; apartments, commercial buildings, residential developments
Compliance	Meets USPS 4C standards; ADA height compliant units available
Construction	Includes USPS-approved 4C mailbox unit and matching free-standing enclosure

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Frequently Asked Questions (FAQ):

Q: What are the overall dimensions?
A: Approximately 31.75 in W x 72.125 in H x 18.5 in D.

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Q: Is this unit USPS approved and front-loading?
A: Yes, it’s a USPS-approved 4C mailbox with front-loading master door access.

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Q: What materials are used?
A: Constructed of heavy-duty aluminum with stainless steel hardware and a powder-coated finish.

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Q: How many tenant and parcel compartments are included?
A: 20 tenant mail doors and 2 fully integrated parcel lockers, plus an outgoing mail compartment.

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Q: Can it be installed outdoors?
A: Yes, it is designed for indoor or outdoor use with weather-resistant features.

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Streamlined Mail Hub, Elevated Curb Appeal

This sleek, monolithic mailbox station brings order and elegance to multifamily entries and modern commercial lobbies. The matte black, powder-coated aluminum creates a refined architectural statement while neatly organizing deliveries behind clean, numbered doors. Style it against light stone or warm wood cladding to heighten contrast and sophistication. A polished essential for luxury living, it marries security with impeccable design.

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Create a secure, professional mail center—add this 4C free-standing mailbox to your project today.

Installation