4B+ Horizontal Mailboxes per Salsbury Industries

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.