This economical locking mailbox features an 18 gauge galvanized steel body and door with a double black powder coated finish. It accepts larger pieces of mail and smaller packages. Convenient outgoing tray is also an internal baffle to help keep unwanted hands from reaching into the mail storage area. The LetterSentry is mounted on the direct burial standard 12 gauge steel post which features a matching black powder coated finish. Post is 48″ long x 3″ diameter. Incoming slot: 10″ wide x 1-3/4″ high. Outgoing tray is 10″ wide x 6″ deep.