Wall system includes a basic pocket and add-on pockets. Basic pocket mounts flush to wall. Each pocket has a 1 5/16in capacity. Straight corner design. Can be used as panel mount system with hanger set sold separately. Includes deluxe Hot File® labeling system. Plastic. Hanging File Systems Type: Expandable Multiple Pockets; For File Size: Letter; Overall Height: 17in; Width: 13in.