Avery UltraDuty Ring Binder - Letter - 8 1/2" x 11" Sheet Size - 735 Sheet Capacity - 4 45/64" Spine Width - 3" Ring - Fastener: Slant Ring - Pocket: 0 - Polypropylene - Yellow, Red - Durable, Heavy Duty, Flexible, Water Resistant, Abrasion Resistant