... : 4-7mm,7-15mm,15-25mm.25-50mm,50-80mm, calcium carbide 50 80mmApplicantion:This product is lumpy substance, its surface is a ... atomic mass)10. SIZE4-7,7-15,15-25,25-50,50-80,80-120MM11. Packing50kg or 100kg iron drumCautions during transportion ... allowed to avoid the spark leads to explosion. calcium carbide 50 80mm