... raw material makes good hardness and toughness,high efficiency and durability.SpecificationGood quality and high hardness;Reputable supplier and manufacture;Competitive price ... hard metals;Grinding wheels, abrasive belts;As main material of deoxidier;Founctional ceramic; Metallurgy;High advanced refractory materialPacking: 25kg/bag, ... ;Payment: T/T, L/C, D/A,D/P; High quality black silicon carbide