3M Wetordry 99421NA Sandpaper 11 in L 9 in W Extra Fine 320 Grit Silicon Carbide Abrasive Paper Backing

Primarily used in the metalworking and woodworking industries, the 3M™ Wetordry™ paper sheet, 413Q, is a silicon carbide, closed coat product bonded with a waterproof resin. It works well for sanding old finishes, fine featheredging, surface work and can be used wet or dry.