Mailboxes are made from Galvanized steel that resists outdoor elements to ensure lasting durability. The Rural Mailboxes are designed to be mounted on a post for stability and are crafted in the preferred standard size to accommodate all of your mail. Protected by a striking, rust-resistant black finish, the mailbox is U.S. Postmaster General approved and comes complete with an aluminum flag and steel latch for convenient operation. Medium-sized design with 20 in. approximate depth provides plenty of room for letters, magazines and other mail. Adjustable steel latch allows you to keep the box securely closed. Fully assembled for immediate installation. Mounting bracket and hardware sold separately. Match with any Gibraltar and Architectural mailboxes post with the designation letter code A.