Medical Oxygen Cylinder Medical oxygen cylinder is an amazing product for you if you are looking for raising your oxygen levels. The cylinder is packaged in a small tin canister weighing 100 grams containing 6 liters of oxygen that makes up around 150 inhalations. Oxygen canister comes attached with a spray used for inhaling oxygen. Comprised of 99% pure oxygen, inhaling from the portable oxygen cylinder would immediately raise your oxygen level. It is supplemental oxygen used for increasing your level of oxygen if you suffer from low oxygen. Patients suffering from breathing disorders such as COPD, asthma, hypoxia, etc, would also be significantly benefited.