Salsbury 4B+ Horizontal Mailboxes are the perfect secure storage system for sending and receiving mail and packages fast and safely. Available through Mailboxes.com, our Salsbury 4B+ Horizontal Mailboxes are in varying sizes and can be customized to fit your horizontal mailbox needs.

Salsbury 4B+ Horizontal Mailboxes are designed for replacement and retrofit installations and are ideal for apartments, condominiums, and office buildings. Made entirely of aluminum with a durable powder-coated finish, the Salsbury 3600 series 4B+ horizontal mailboxes are built to last. They are USPS-approved and meet the required security upgrades of USPS-STD-4B+. You can rest assured your horizontal mailboxes meet all strict guidelines.

Types of 4B+ Horizontal Mailboxes

Types of 4B+ Horizontal Mailboxes

The 4B+ Horizontal Mailboxes come in many different types, such as Front and Rear Loading Mailboxes. At Salsbury Industries, the 4B+ Horizontal Mailboxes are available in numerous sizes, colors, and more. Choose to customize your 4B+ Horizontal Mailboxes by integrating different combinations of mailbox doors and select your powder-coated colors like aluminum, bronze, or sandstone finish. Custom colors are available as an option upon request.

4B+ Horizontal Mailbox Features

4B+ Horizontal Mailbox Features

All 4B+ Horizontal Mailboxes from Salsbury Industries are U.S.P.S. approved and made of aluminum with a durable powder-coated finish. Horizontal mailboxes come in various sizes, from 5-door high units to 6-door, 7-door, and more. Additionally, horizontal mailboxes can come with added features like custom engraved placards, custom engraved doors (regular or black-filled), replacement locks, additional keys, and blank keys.

4B+ Horizontal Mailbox Sizes

4B+ Horizontal Mailbox Sizes

USPS Approved Horizontal Mailboxes come in all sizes, so you can find the correct mailbox you need. Find horizontal mailboxes in the unit height of either a 7-door high unit (40 3/4"), 6-door high unit (35 1/4"), or 5-door high unit (29 3/4"). Select the number of mailbox doors needed from a wide range, including 9 to 35.

4B+ Horizontal Mailbox Colors

4B+ Horizontal Mailbox Colors

Salsbury Industries 4B+ Horizontal Mailboxes have a beautiful powder coat finish and are available in various colors, including aluminum, bronze, and sandstone. If you need a different color to best suit your apartments, commercial buildings, or residential developments, custom colors are offered.

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