Peel and Stick Application Saves Time and Effort 100% Polyester Backing with Pressure Sensitive Adhesive Available in 60X, 80X, 120X, 220X and 400x Grits in 5", 6" and 7" Sizes CRL Stick-On Sanding Discs with pressure sensitive adhesive are 100% polyester waterproof material. Made with high quality silicon carbide grain, these discs provide savings where it counts the most, time and labor. Simply peel off the lining and stick the disc on your CRL Backup Pad. Five popular grits are stocked with a grit range from 24X to 400X available on special order. Grit: 80X Size: 6 in (152 mm) Additional Product Information: Three Standard Sizes: 5 inch (127 millimeter) 6 inch (152 millimeter) 7 inch (178 millimeter) Most Popular Grits for Glass, and Examples of Their Use: 60X - Very Rough: Quick General Roughing 80X - Rough: Quick Contouring (Auto Glass Edge) 120X - Smooth: Seaming and Polishing (Desk Top Edge) 220X - Extra Smooth: Fine Frosted Finish (Glass Shelf Edge) 400X - Extra Fine: Extra Fine Frosted Finish (Glass Shelf Edge)