Made from heavy-duty, PVC-free, injection molded polypropylene with dual-fold living hinge cover. Guaranteed not to crack or break even with most active use. So easy to operate, a single finger can open, close and lock tight. Archival safe for all documents and photos. Sheet lifter in all sizes. Labels included. Earned Ease-of-Use Commendation from the Arthritis Foundation. Maximum Capacity Range ("): 4 in; Sheet Capacity: 775; Color(s): Black; Binder Sheet Size: 11 x 8 1/2.