We could supply oxygen gas of purity 99%, 99.9%, 99.99% and 99.999% Pure Gases,High Purity GasesProduct nameTechnical index(%) StandardUnit ApplicationPure hydrogen ≥99.99GB/T7445-1995CylinderElectronic industry, testingPure helium ≥99.995GB/T4844.2-1995CylinderElectronic industry, chemical industry, analysisPure Neon ≥99.99 CylinderMaking lamp, chemical industry, analysisPure Argon ≥99.99GB/ ...