Architectural Mailboxes Maison appeals to even the most discerning homeowner with a timeless design and durable construction. The Maison is constructed of cast aluminum and galvanized steel and finished with a heavy powder coat. The Maison mailbox is able to accept a USPS priority mail envelope, as well as mail bundles and magazines. The mailbox is equipped with a large mail compartment, stainless steel cam lock with two keys and is pre-drilled for easy installation. Main body, retrieval door and flap are cast aluminum, back panel is 24 gauge galvanized steel. Pre-drilled for easy installation. Includes all mounting hardware and instructions.