Architectural Mailboxes Oasis Jr. Curbside Locking Mailbox 15x11.5x18 Inch - White Architectural Mailboxes Oasis Jr. Post-Mount Locking Mailbox features rubber seals on doors to assist in keeping deliveries clean and dry. The hopper door makes it convenient for those that enjoy catalog and online ordering. The stainless-steel body features a powder-coated finish for corrosion resistance. Hopper door allows for convenient delivery of mail bundles and small parcels. Rubber seals on incoming hopper and mail retrieval doors help keep deliveries clean and dry. Constructed of heavy 16- and 14-gauge galvanized steel. 4 x 10 bolt mounting pattern. Able to be installed on or into a masonry column. Can also attach box to a standard or decorative post. Works for use with multi-family configurations. Approved by the US Postmaster General. Color: White. Material: Galvanized steel. Depth: 18 . Height: 15 . Width: 11.5 .