Salsbury Industries 4750BGE Mail House, Beige May be used for U.S.P.S. residential door mail delivery Made of electro-galvanized 20-gauge steel Include a stainless steel mail flap with a 12 in. W x 1-1/4 in. H opening Accessed from the front through a 13 in. W x 9 in. H locking door and include a lock (with 2 keys) Mailboxes can be post mounted or surface mounted