... then 98% 2.grit: from F12 to F3000 3,manufacturer Refractory , polishing ,abrasives material ,green silicon carbide with high ... silicon, elaborate Abrasive, special ceramics and high-class fire resistance material.Property:It is brown and features toughness ... grinding and polishing,making high quality refactory materials,grinding carbon steel,alloy steel,malleable cast iron,hard bronze and ...