Wurth "Gold" brand high performance foam backed sanding sponges. Heat Treated Aluminum Oxide on flexible sponge backing - open coat Excellent flexibility for irregular surfaces with "no load" performance Roll packaging in heavy duty cardboard package keeps sponges clean and dust free, ready to use Cut out in box makes it easy to tell when it is time to re-order Perforated sections make for easy tear-off Ideal for scuff sanding in your finishing room Each sponge measures 4-1/2"W x 4-7/8" L