Salsbury Industries 3506ASU Surface Mounted Vertical Mailbox with 6 Doors and USPS Access, Aluminum Doors and trim are striated to resist scratching Doors include a 5 pin cylinder cam lock (with 2 keys) Mailboxes are available with 3 to 7 compartments Individual compartment size is 5-1/2"inches W x 16-1/4"inches H x 6-3/4"inches D