... ; Gas yield: 295L/kg min ; Size: 4-7mm,7-15mm,15-25mm.25-50mm,50-80mm,80-120mm Applicantion:This product ... to 1995 international relative atomic mass)10. SIZE4-7,7-15,15-25,25-50,50-80,80-120MM11. Packing50kg or 100kg ... allowed to avoid the spark leads to explosion. Calcium Carbide 15-25MM