Architectural Mailboxes 2572B-10 Princeton Locking Wall Mount Mailbox, Medium, Black Made of an extremely sturdy galvanized steel, the Architectural Mailboxes Princeton Locking Wall Mount Mailbox boasts a sleek matte black finish and streamlined silhouette. This convenient wall-mounted mailbox has a large door with a flip-top lid that offers ample room for bills, catalogs, and more. A locking feature provides added security, and it installs in minutes using the pre-drilled holes. Dimensions: 10.55L x 4.8D x 14.02H in.. Crafted with galvanized steel. Matte black finish. Easy installation with pre-drilled holes. Large door for mail retrieval.