20"" SAND SCREEN DISC 120 GRIT - 10 PER CASE COMMONLY USED FOR COATINGS REPAIR ON WOOD GYM OR PAINTED FLOOR SURFACES. SAND SCREEN DISCS ARE ALSO USED FOR REPAIR OF PAINTED FLOOR SURFACES. BOTH SIDES OF THE DISC CAN BE USED WET OR DRY. SOLD 10 SCREENS PER CASE.