BTS 1 Litre 300 Bar Cylinder with Top Handled DIN Valve S16716673 1 Litre 300 Bar ECS - Eurocylinder 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. For use with normal Breathing Air, all O-Rings are Viton ready for O2 cleaning for use with Nitrox. Cylinder Measures 265mm in length with a Diameter of 83mm, weighs 2.06 Kgs plus Valve, buoyancy of -0.97 Kgs in Sea Water & -1.08 Kgs in Fresh Water when Fully Charged.