Silicon Carbide, Boron Carbide, Bulletproof Plate manufacturer / supplier in China, offering Sic Manufacture Factory Black/Green Silicon Carbide Ceramic Powder /Sic Price for Abrasive Material, High-End Refractory 16 20 24 30 36 46 60 80 100 120 150 180 220 240 Green Silicon Carbide Powder, Factory Direct Supply of High Quality Boron Carbide Powder B4c, Various Particle Sizes and so on.