Avery® UltraDuty Ring Binder - Letter - 8 1/2 x 11 Sheet Size - 735 Sheet Capacity - 4 45/64 Spine Width - 3 x Slant Ring Fastener(s) - Polypropylene, Plastic - Yellow, Red - Durable, Flexible, Water Resistant, Abrasion Resistant, Chemical Resistant, Clasp Closure, Reinforced Hole, Spine, Damage Resistant, Heavy Duty, Divider - 1