USPS-Approved Replacement Mail Solutions

Ensure secure, compliant, and space-efficient mail delivery with 4B+ Horizontal Mailboxes, designed for multi-tenant buildings, apartments, offices, and commercial properties. These USPS-approved mailboxes are ideal for replacing older 4B units in existing structures while meeting modern security and durability standards.

Why Choose 4B+ Horizontal Mailboxes?

✔ USPS-Approved for Replacement Use – Complies with USPS regulations for retrofitting and replacing outdated 4B mailboxes.
✔ Durable, Heavy-Duty Construction – Made from rust-resistant aluminum to withstand high-traffic use.
✔ Secure Tenant Compartments – Includes individually locked mail slots to protect deliveries.
✔ Multiple Sizes & Configurations – Available in various door layouts and colors to match existing installations.
✔ Ideal for Multi-Tenant & Commercial Properties – Perfect for apartment buildings, office complexes, and older developments requiring USPS-compliant upgrades.

Upgrade outdated mail systems with 4B+ Horizontal Mailboxes, the secure and USPS-compliant solution for existing installations.