Avery UltraDuty Ring Binder - Letter - 8 1/2" x 11" Sheet Size - 375 Sheet Capacity - 3 1/2" Spine Width - 1.50" Ring - Fastener(s): 3 x Slant Ring - Pocket(s): 0 - Polypropylene - Red, Yellow - Durable, Flexible, Water Resistant, Abrasion Resistant,