Smead Products - Smead - Poly Ring Binder Pockets, 9 x 11-1/2, Clear, 3/Pack - Sold As 1 Pack - Flap with hook and loop closure secures bulky documents. - Binder pockets are acid-free, archival quality. - Standard 3-ring binder, holds letter-sized material. Binder pockets made from poly material for standard three ring binders have hook and loop flap closure. Pocket expands up to 1 1/4 inches. Acid-free. Store items in a three-ring binder without hole-punching. Clear poly envelope with three-hole punched flap fits into a standard binder. Expands up to 1-1/4'' to hold multiple items. Clear poly material is tear- and water-resistant.