Norton ProSand 11 in. L x 9 in. W 180 Grit Aluminum Oxide Sandpaper 20 pk (Pack of 20)With a water based, non pigmented stearate coating that offers an open coat with excellent resistance to loading and clogging, this ProSand A259PS fine grit paper sheet is made without color dye to prevent color transfer. The premium, heat treated abrasive cuts faster and lasts longer than 3X technology and the latex saturation, fiber reinforcement and increased weight offer tear resistance and grain retention while still being flexible enough to