Business Source Sheet Protectors - For Letter 8 1/2" x 11" Sheet - 3 x Holes - Ring Binder - Top Loading - Rectangular - Clear - Polypropylene - 50/Pack - 4 / Box Durable, top-loading sheet protectors hold letter-size inserts without punching. Printed materials do not stick or lift off this specially formulated polypropylene material. Design features a reinforced strip at binding edge and three-hole punched sides. Die- corners on ring side allow pages to turn freely. Oversized ring binders and indexes are sold separately.