Made of electro-galvanized 20 gauge steel, mail houses include a stainless steel mail flap. Mail houses can be surface mounted, mounted on bolt mounted mailbox posts (mbs4765), in-ground mounted mailbox posts (mbs4795) or a base of your choice. Each mail house features a durable powder coated finish available in four (4) contemporary colors. Mail houses are accessed from the front through a 13” W x 9” H locking door and include a lock with two (2) keys. A non-locking thumb latch (mbs4788) is available as an option upon request. Mail houses may be used for U.S.P.S. residential door mail delivery.