Avery UltraDuty Ring Binder - Letter - 8 1/2" x 11" Sheet Size - 530 Sheet Capacity - 3 1/10" Spine Width - 3 x 2" Ring - Fastener: Slant Ring - Pocket: 0 - Polypropylene - Yellow, Red - Durable, Flexible, Water Resistant, Abrasion Resistant, Chemica