Brown Fused Alumina, Abrasive Wheels, Resin Grinding Wheels manufacturer / supplier in China, offering Black Silicon Carbide Has a Mohs Hardness of 9.2 and Is of High Hardness, Premium High-Hardness Black Silicon Carbide for Efficient Sandblasting, Durable T27-125*6*22mm Grinding Wheel Disc for Angle Grinder and so on.