Salsbury Industries 4325BLK Roadside Mailbox, Black Include an outgoing mail tray and an adjustable red signal flag Front and rear access locking door with 2 keys for each door (keyed alike) Mail is deposited through a non-locking access panel on the front and includes an outgoing mail tray Mailboxes can be mounted on posts and in columns, masonry or walls Feature a durable powder coated finish available in black, green, silver and white Include an outgoing mail tray and an adjustable red signal flag. Size: 12.5" W x 13.625" H x 18.25" D Mailboxes can be mounted on posts and in columns, masonry or walls