We are direct manufacturer and exporter of calcium carbide in China. We have a large scale factory located in Tianjin suburban area where is very near to Xingang port for easy transportation. Calcium Carbide Origin from China Size: 25-50mm/50-80mm/80-120mm (15-25mm also available) Gas yield: 295L/KG min. PH3: 0.06% max. H2S: 0.08% max. Molecular formula:CaC2 UN:1402 Class:4.3 HS Code:28491000 Molecular weight:64.10 Cas No:75-20-7 Packed in iron drums with N2 gas of 100kg net each. Payment: L/C at sight or 30% TT in advance. Shipment time: about 15-20 days upon L/C receipt. Loading port: Xingang port, China Please show us your interest. We welcome you to visit our factory for our friendly cooperation if possible. Thanks for your time. -- NGO Chemical Group Ltd. Address: RM 2205 Guohua Building, No. 857 Dugu South Road, Hexi Dist Tianjin, China Email:zhangyh9988@126.com