1.Calcium carbide 295l/kg 2.ISO9001 3.Gas yield: 280,290,295L/KG 4.Timely delivery 5.Packing:50/100kg new ... calcium for you. Specification: 1).Gas yield: 280L/KG,290L/KG,295L/KG2).Sizes:4-7mm;7-15mm;15-25mm;25 ... H2S content in acetylene max, 7-15mm,Gas Yield≥290L/KG, 0.06%≤PH3 content in acetylene max.0.1 ... %≤H2S content in acetylene max. 15-25mm,Gas Yield≥290L/KG, 0.06%≤PH3 content in acetylene max.0.1 ...