You can buy various high quality oxygen cylinders here which are designed to be easily transported and give patients greater freedom. Available empty oxygen cylinders with durable design and long life and cylinders that come with bag and belt. The home-fill cylinders are revolutionary products that allow patients to fill their own high-pressure cylinders from a concentrator. The connection and control are designed for ease of operation. Also available units which extract purified oxygen from room air using oxygen concentrator technology.