BTS 1.8 Litre 230 Bar Black Steel Cylinder with Top Handled DIN Valve S16716668 1.8 Litre 230 Bar ECS - Eurocylinder Black Steel Cylinder complete with M18 Top Handled 230 Bar G5/8 DIN Outlet Valve for use with Regulator 1st Stages with Standard Male 232 Bar DIN Thread, which can be easily converted for use with INT - A Clamp Regulators with an optional DIN Insert. For use with normal Breathing Air, all O-Rings are Viton ready for O2 cleaning for use with Nitrox. Cylinder Measures 450mm in length with a Diameter of 83mm, weighs 3.2 Kgs plus Valve, buoyancy of -1.05 Kgs in Sea Water & -1.26 Kgs in Fresh Water when Fully Charged.