Thick and durable with a diamond clear finish ? ideal for long-term storage. Non-stick polypropylene material is acid-free and won't lift print. Easy Load feature makes inserting sheets fast and easy. Top loading?no need to punch inserts. Clear binding edge for a professional look. Load Orientation: Top; Sheet Protector Type: Ring Binder; Insert Size: 8 1/2 x 11; Material(s): Polypropylene.