Silicon Carbide, Boron Carbide, Silicon Carbide Wafer manufacturer / supplier in China, offering Fine Polished Ceramic Ball Silicon Carbide Ball Zirconia Ceramic Grinding Ball, Manufacturer Boron Carbide Powder 325mesh B4c Boron Carbide F180, F240, F320, F360, F400, F1200, High Purity 99.5% Boron Carbide (B4C) Nanopowder/Nanoparticles Size: 40-60 Nm and so on.