BTS 7 Litre 200 Bar Natural Luxfer Aluminium Cylinder with M26 Valve S16216509 7 Litre - 50 Cubic Feet 200 Bar Luxfer Natural 'Dirty Beast' Aluminium Cylinder complete with M26 Nitrox Outlet Valve for use with Nitox Regulator 1st Stages with M26 Male Thread. All O-Rings are Viton ready for O2 cleaning for use with Nitrox. Cylinder Measures 610mm in length with a Diameter of 152mm, weighs 10.69 Kgs plus Valve, buoyancy of +0.19 Kgs in Sea Water & -0.74 Kgs in Fresh Water when Fully Charged.