Portable Oxygen system- Steel 'E' cylinder 23.1 cu ft @2015psi, giving 43.6 hrs @ 10000' one user or 21.8 hr@a5000' two users. Includes Aerox Flowmeter, padded bag to fit back of seat, pouch for breathing canulas and mask. also available free of charge large charging cylinder with oxygen. call for details and freigh if unable pick up in Devon near Honiton or at Dunkeswell airport. Tel 01404831195.