BTS 10 Litre 232 Bar Steel Cylinder with M26 Valve & Boot S16816604 10 Litre ECS - Eurocylinder 232 Bar Steel Cylinder complete with Boot & M26 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 595mm in length with a Diameter of 171mm, weighs 14.78 Kgs plus Valve, buoyancy of -2.13 Kgs in Sea Water & -3.21 Kgs in Fresh Water when Fully Charged.