Business Source Basic Round-ring Binder - 3" Binder Capacity - Letter - 8 1/2" x 11" Sheet Size - 3 x Round Ring Fastener(s) - Inside Front & Back Pocket(s) - Vinyl - Black - 1.20 lb - Recycled - 1 / Each - Basic round-ring binder features two triggers on the ring mechanism that provide easy access to your documents. Back-mounted metal rings allow pages to lie flat. 3" capacity holds up to 625 sheets. Clear pockets inside front and back covers offer extra document storage with a 30-sheet capacity for each pocket. Design also features a sturdy chipboard core and exposed rivets. Three-ring binder is made of polypropylene.