... UNIFORM DISTRIBUTION OF ABRASIVE,GRINDING SHARP,DUR WATERPROOF SILICON CARBIDE SAND PAPERHAFL RESIN, 150G PAPER BASEABRASIVE GRAIN SIZES:40~400#CHARACTERISTICS ... TOUGH ,WEARRESISTANT FOLDING,AND HAVE GOOD WATER RESISTANCE,THE GRINDING SAND AND OTHER ABRASIVE MATERIALS SUCH AS ADHESIVES WITH GUM ADHESIVE ...