Cardinal EasyOpen Ring Binder - Letter - 8 1/2" (215.90 mm) x 11" (279.40 mm) Sheet Size - 400 Sheet Capacity - 3 x 1" (25.40 mm) Ring(s) - Fastener(s): Slant D-Ring - Pocket(s): 4, Internal - Polypropylene, Board, Fiber - Blue - Recycled - Durable, One Touch Ring, Reusable, Heavy Duty, Wrinkle Resi