OXY99 offers wide array of oxygen products including Hospital Oxygen Cylinders. Our disposable oxygen cylinder is the ideal product for raising your oxygen level back to normal. The product is used for stabilizing the oxygen level in the blood so that you do not suffer from the effects of poor air quality. As cities have become polluted which affect the level of oxygen in your bloodstream, you need to take supplemental oxygen. Oxygen present in the atmosphere averages around 21% but in pre-historic times it used average around 30-35%, which has steadily declined over the ages but was severely affected because of rapid industrialization in 19th century.