Everything you need to set up a durable efficient hanging wall file system. Constructed of unbreakable plastic to stand up to busy work environments. Each pocket: 13 3/4w x 3 1/8d x 6 5/8h. Expand with Single Pocket sold separately. Mounts to wall. Hanging File Systems Type: Expandable Multiple Pockets For File Size: A4 Letter Overall Height: 29 3/8 in Width: 13 3/4 in.Unit of Measure : Each