A line of our aluminum oxygen cylinders featured in our XCP, XCR & EDS portable oxygen systems. These cylinders can be supplied with our low-profile CGA-540 or DIN-477#9 valves with pressure gauge that shows amount in the cylinder at all times with the valve open or closed. These aluminum cylinders are intended for portable 'carry-on' applications, or permanent mounting. See our FullPack cylinder harness & carry-caddy for these cylinders. Also see CMK cylinder hold-down kits.