The Architectural Mailboxes Oasis Post-Mount Mailbox is a locking curbside mailbox that is approved by the US Postmaster General. Its body is constructed of heavy 14- and 16-Gauge galvanized steel and has a powder coat for durability and long lasting use. The incoming hopper and mail retrieval doors include rubber seals to help keep deliveries clean and dry. All hardware is made from stainless steel and other corrosion resistant materials. A stainless steel cam lock with 2 keys is included. This mailbox comes with installation instructions to help make that process easier. Color: White.