Sparco Sheet Protectors, Top Load, 3.3 mil, 9 x 11 Inches, 50 per Box, Clear (SPR74106) Durable, top-loading sheet protectors hold inserts without punching Nonstick polypropylene will not lift off material; die-cut corners on ring side allow pages to turn freely Features 3.3 mil thickness, reinforced strip at binding edge and three-hole punched sides