BTS 5.7 Litre 207 Bar Natural MES Aluminium Cylinder with Right Hand M26 Valve & Blanking Plug S16416676 5.7 Litre - 40 Cubic Feet 207 Bar MES Natural 'Dirty Beast Aluminium Cylinder complete with Right Handed 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 628mm in length with a Diameter of 133mm, weighs 8.33 Kgs plus Valve, buoyancy of +0.25 Kgs in Sea Water & -0.5 Kgs in Fresh Water when Fully Charged.