Apartment Style Commercial Vertical Mailboxes
4B+ Vertical Apartment Mailboxes are ideal for apartments, condominiums and office buildings. They are designed for replacement and retrofit installations.
Features
– Made entirely of aluminum
– USPS approved and feature a durable powder coated finish
– Available aluminum, bronze, or sandstone
– Available with 3-7 doors
– Optional outgoing mail compartment
– Optional door number placards
3500 series 4B+ Vertical Apartment Mailboxes are available as surface mounted or recessed mounted units. Surface mounted units are designed to be mounted on a wall or other flat surface. Recessed mounted units are designed to fit into a rough opening. 3500 series 4B+ mailboxes have been U.S.P.S. approved to the required security upgrades of USPS-STD-4B+. 4B+ vertical mailboxes are approved for replacement and/or retrofit installations effective October 2006.
Generally speaking, these units are for interior use only.  They can be used outdoors in a protected location. They cannot be outside in direct rain. They must be sheltered or your mail will get wet.