Carbon Raiser, Carbon Black, Dicyandiamide manufacturer / supplier in China, offering Calcium Carbide 25-50mm Cac2 for Welding 50kg Calcium Carbide 295L/Kg, Calcium Carbide Gas Yield 295-305L/Kg for Acetylene Gas 15-25mm, Superior Calcium Carbide 80-120mm for Optimal Gas Yield 295-305L/Kg and so on.