Mirka's 21 Series P1000 Waterproof Paper2 _ Mirka’s 21 Series Waterproof paper features a unique flexible resin bond to eliminate cracking, even when folded. Full resin bonding on quality latex paper makes the product ideal for wet and dry sanding. Used to quickly remove dirt and imperfections from clearcoats. A consistent and precise manufacturing process provides a finer scratch pattern for an improved finish. Available in both 9 x 11 full size sheets as well as in half size 5-1/2 x 9. B-Weight 50 per sleeve, 10 sleeves per case 21-118-P1000 No -