The space saving Roll-A-Bout Enclosures for Guardian Mailboxes are great for private postal centers or any place where wall space is limited. The large locking rear door makes distribution easy and provides security for the mailbox contents, while custoemrs retireve mail from the front of the unit using their key. The Roll-A-Bout's 3" swivel casters allowing them to be easily rolled away when not in use. Units can hold 9 Guardian mailbox modules (the oversized Guardian unit takes up 2 spaces) Guardian mailboxes not included. Constructed from steel with a vinyl wrap. Light Oak color.