... , china. ♦ Ceramics, resin, rubber grinding wheel, refractory material.♦ Sandblasting, dry grinding, free grinding as well as cutting and making jewelry, jade, agate. ♦ Grinding of gray ... , brass, ore, bone, glass, leather, rubber, plastic and the thermal sensitive material.3. Partical size,Black silicon carbide F12-320# F320-2000# JIS240-10000# Sic ...