... portable oxygen can 1.high purity,portable,green,pure,safe. 2.Small,big-capacity,easy to carry,can be used at anytime,anywhere Portable ... :240mmScope of application:This portable oxygen can suits for elderly people, overusing of brain people, high pressure from work,hard ... 4.after finish using, cover the cover.Structure of the portable oxygen can :Flavor: mint and grapefruit.* OEM is welcome. ...