we have many years experience, we have export many contries, hope you can join us calcium carbideSize:0-4mm,4-7mm,7-15mm,15-25mm,25-50mm,50-80mm,80-120mm,120-250mmGas yield:285l/kg,295l/kg,305l/kg. 50/100/200/250kgs new steel drumSpecificationGB10665-2004SpecificationSuperfine GradeFirst GradeSecond GradeGas yield(L/kg)(L/kg) ≥300280260PH3 content in acetylene (PH3%) ≤0.060.080.08H2S content in ...