Qingdao Guida Special Gas Co., Ltd. specializing in special gas, industrial gases, medical gases and calibration gases for more than six years. What the mainly gases we sell is Oxygen(O2), Carbon Monoxide(CO), Ethylene(C2H4), Sulfur Hexafluoride(SF6), Carbon Tetrafluoride(CF4), Nitrous Oxide(N2O),Sulfur dioxide(SO2), CO2/ETO, etc. We also provide various specifications of high pressure seamless steel gas cylinders, high pressure aluminum gas cylinders, Dewars, drums and other equipment. Cylinder standards include: DOT-3AA, GB5099, EN1964-1, ISO9809-1, ISO9809-2 and ISO9809-3 with TUV, BV, CE certificate. We take great pride in providing our customers high quality products and superior service, which make us enjoy a high reputation in our country and own a certain number of customers of USA, Canada, Netherlands, France, UAE, etc. Based on good quality, resonable price and best service, our vision is to supply your need, answer your questions and solve your problem.