✔Oxygen Gas Cylinder price in Kenya They are used in hospitals and home for patients with Breathing difficulties. Oxygen tanks also known as oxygen cylinders used to store gas formedical breathing at medical facilities and at home. Clinical Purpose: A Container designed as a refillable cylinder used to hold compressed medical Oxygen (O2) under safe conditions at high pressure; O2 is used as an essential life support gas, for anesthesia, and for therapeutic purposes.