We can supply all kinds of high purity gas, such as oxygen,argon, nitrogen, CO2, helium, etc. ProductspuritystandardunitApplicationoxygen≥ ... balloon used in chemical industry.pure Helium≥99.995GB/T4844.2-1995bottle/cylinder Electronic industry, chemical industry, analysis Pure argon ≥99 ... , stainless steel smelting, container, steel structure manufacture, mold processing, etc. High purity argon gas