... size oxygen can 1.high purity,portable,green,pure,safe. 2.Small,big ... CE certificate,FDA certificateParameters:Net volume: 10000mlConcentration: ≥95%Pressure: 0.8Mpadiameter:72mmheight:315mmScope of application:Small size ... elderly people, overusing of brain people, high pressure from work,hard to breath people, after sport ... mint and grapefruit.* OEM is welcome. portable small size oxygen can 10000ml