DEAR SIR We want to buy  seamless steel cylinders for high pressure oxyzen gas cylinders confirming to IS 7285 specification. Water Capacity   40/47Ltrs Gas                      Industrial Oxyzen Specification       IS 7285 Filling Pressure  150kgf/cm.sq Test Pressure     250Kgf /cm.sq Outside diameter 232/219MM               (approx) Length  approx      1370 /1330mm Base                        Concave Internal thread       25.4mm as per IS 3224 Neck ring                Required Painting                  Black Valve                       With   Quantity                  1000 Cylinder Please contact only for manufacturer. Thanks Best Regards Goldy