BTS 7 Litre 200 Bar White Luxfer Aluminium Cylinder with Nitrox Rebreather Valve S16216512 7 Litre - 50 Cubic Feet 200 Bar Luxfer White Aluminium Cylinder Cylinder complete with Nitrox 230 Bar G5/8 DIN Outlet Rebreather Valve. For use with Nitrox Regualtor 1st Stages with Male M26 Connection Thread. Cylinder Measures 610mm in length with a Diameter of 152mm