C-Line Super Heavyweight Poly Binder Pocket with Hook & Loop Closure, 1-Inch Gusset, Letter Size, Pack of 36, Assorted Colors (58730) Binder Pockets are made from durable acid-free polypropylene Gusset expands 1 inch for additional capacity of up to 200 sheets Side loading pocket is secured with a hook and loop closure For 11" x 8-1/2" document storage Fits standard 3-ring binders Assorted colors include blue, aqua, purple, pink, smoke; pack of 36 pockets