3M 99439NA Pro-Pak Drywall Sanding Screens 180-Grit, 4-3/16 by 11-1/4-Inch, 10-Pack Drywall, plaster, Made with sharp silicone carbide mineral for long lasting performance Die-cut. Made to fit most drywall sanding tools. Drywall, plaster, 180 Grit Sanding Screens Made with sharp silicone carbide mineral for long lasting performance Waterproof and can be rinsed for reuse