Silicone Carbide Drywall Sanding Screens: Delivers fast, excellent results when sanding drywall joints and patching compound. Coated with sharp silicon carbide abrasive and is water resistant, rinsable and reusable. Drywall screens are bonded with phenolic resin & made for manual or machine use. 120 Grit. 4-3/16 x 11″. 25pk.