Below specification are all for standard sizes, we can also supply you non-standard cylinder if you want. STEEL OXYGEN SEAMLESS CYLINDER 3L Steel oxygen seamless cylinder (Stahl Sauerstoff nahtlose Cylinder) High Pressure Seamless Steel CylindersSerial No.TypeNominal working Pressure(Mpa)Water test pressure(Mpa)Volume(L)Nominal Outer Dia.(mm)Length(mm)Weight (kg)1WMA140-4-15152541403957.42WMA140-5-15152551404508.23WMA140-6.3-1515256.31405409.44WMA140-8-151525814068511.45WMA140-10-1515251014084513.46WMA159-8-1515258159545117WMA159-10-15152510159675138WMA159-15-15152515159955199WMA219-20-151525202197302910WMA219-25-151525252198853311WMA219-32-1515253221910904012WMA219-40-15152540219131048 No.1-No12 Material: 34CrMo4 No.1-No12 According to standard: GB5099 EN1964