1.purity:99.9-99.9999% 2.packing:cylinder 40L-80L 3.sale cylinder together high purity Industrial gases productsProduct namepuritystandardunitApplicationIndustrial oxygen ≥99.5GB-T3863-1995BottleSteel cutting, welding, flame processingLiquid oxygen ≥99.5GB-T3863-1995 TonSteel cutting, welding, flame processingIndustrial nitrogen ≥99.5GB-T3864-1996BottleReplacement gas and protection gas for ...