... cylinder is designed manufactured and inspected according to EN1964/ISO standard. Specifications1, Material: 34Mn2V, 34CrMo42, Service Pressure: 150~200Bar / 2175~2900pis3 ... , Outside diameter: 219/232/356/406mm3, Water capacity: 19~150L4, Standard: ISO/EN1964 5, Wall thickness: 5.7/5.8/8 ... Gases, Pure Organic Gases, Gas Mixtures, Gas Cylinders EN1964/ISO standard cylinder (steel cylinder)