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 and smoke (no color choice). Pack of 18.