Avery Durable View 3 Ring Binder - 1/2" Binder Capacity - Letter - 8 1/2" x 11" Sheet Size - 135 Sheet Capacity - 45/64" Spine Width - 3 x 0.50" Ring - Fastener: Slant Ring - Pocket: 2, Internal - Polypropylene - White - Recycled - Adhesive, Durable, Flex