Wilson Jones 368 Basic Round Ring Binder, 1 inch Cap, BlackTraditional, opaque three-ring binder with round rings is great for basic document organization and storage. Choose your size and keep reference materials on hand. Durable polypropylene construction ensures long-lasting use. Includes two interior pockets. Capacity Range [Max]: 1"; Sheet Capacity: 175; Color(s): Black; Binder Sheet Size: 8 1/2 x 11.