1It is made of PVC material, which is no chemical effect and super waterproof. 2Mainly used for emergency use in hospital and health care product at home. 3Use safety, convenience to carry and durable to use. 4Lock the gas firmly, won't let it run out, at the same time, you can adjust the speed of oxygen output according to your own requirements. 5Oxygen uptake with the size of the clip adjustment.
