Durable, top-loading, sheet protectors hold letter-size inserts without punching and offer a nonglare surface for easy viewing. Printed materials do not stick or lift off this specially formulated polypropylene material. Heavy-duty design features a 3.3 mil thickness, reinforced strip at binding edge and three-hole punched sides. Die-cut corners on ring side allow pages to turn freely. Oversized ring binders and indexes are sold separately.