USPS-Approved Replacement Mail Solutions

Upgrade outdated mail systems with 4B+ Vertical Mailboxes, designed for multi-unit buildings, apartments, offices, and commercial properties. These USPS-approved mailboxes meet modern security and durability standards, making them the ideal solution for replacing older 4B vertical units in existing installations.

Why Choose 4B+ Vertical Mailboxes?

✔ USPS-Approved for Replacement Use – Complies with USPS regulations for retrofitting outdated vertical mailboxes.
✔ Heavy-Duty, Space-Saving Design – Constructed from high-quality aluminum for durability and efficient mail storage.
✔ Secure & Tamper-Resistant – Features individually locked compartments to protect tenants' mail.
✔ Multiple Sizes & Door Configurations – Available in various layouts and color options to match existing installations.
✔ Perfect for Multi-Tenant Properties – Ideal for apartments, condos, office buildings, and older developments requiring compliant replacements.

Keep your mail system USPS-compliant, secure, and reliable with 4B+ Vertical Mailboxes, the perfect retrofit solution for older buildings.