We can supply all kinds of high purity gas, such as oxygen,argon, nitrogen, CO2, helium, etc. ProductspuritystandardunitApplicationoxygen≥99.5GB-T3863-1995bottle/ ... cuttingpure hydrogen≥99.99GB/T7445-1995bottle/cylinder Raw material gas, high-altitude weather balloon used in chemical industry.pure Helium≥ ... smelting, container, steel structure manufacture, mold processing, etc. High purity argon gas