Made of 18 gauge steel, Salsbury 2300 series Free-Standing Roll-A-Bouts include casters for mobility and are useful when space is limited as wall construction is not required. Free-Standing Roll-A-Bouts are rear loading and feature a durable powder coated finish. Each Free-Standing Roll-A-Bout Mail Center includes a large rear door and are locked by placing a standard padlock (related item #2390) through a steel hasp. Aluminum style Roll-A-Bouts (#2300) are designed to accommodate a combination of five (5) aluminum rack ladder system mailboxes and data distribution system boxes and are powder coated black. Brass / Americana style Roll-A-Bouts (#2350) are designed to accommodate a combination of two (2) brass or Americana rear loading mailbox units and are powder coated tan. ORDER MAILBOXES SEPARATELY.