High-capacity slide pages, designed to store twenty 35mm mounted slides Heavyweight, high-clarity polypropylene material for superior protection Top-loading design for easy insertion and removal of slides 9-millimeter thickness to prevent tearing, wrinkling, or distortion Three-hole punched for compatibility with Collector Grade Binders, Metal Edge BinderBox, and Onyx Binder Portfolio Pack of 50 slide pages, ideal for professional photographers and hobbyists alike