Steel Portable Oxygen Cylinder  TypeOutside Diameter(mm)Water Capacity(L)Height mm(without valve)Weight KG(without valve, cap)Design wall thickness(mm)Working pressure(bar)Material GradesXH102-1.8-1501021.83253.53.015037MnXH102-3-15034985.2XH102-3.4-1503.45555.7XH102-4.4-1504.47007.2XH108-1.4-1501081.42402.93.215037MnXH108-1.8-1501.82853.3XH108-2-15023103.6XH108-3-15034374.9XH108-3.6-1503.65155.7XH108-4-15045656.2XH108-5-15056927.5XH140-3.4-1501403.43295.84.115037MnXH140-4-15043736.4XH140-5-15054487.6XH140-6-15065238.8XH140-6.3-1506.35539.2XH140-36.7-1506.75759.5XH140-7-15076039.9XH140-7.5-1507.564010.5XH140-8-150867311.0XH140-9-150975312.2XH140-10-1501083813.5XH140-11-1501189314.3XH140-13.4-15013.4107817.1XH140-14-15014112317.7XH159-7-150159750310.54.715037MnXH159-8-150856211.6XH159-9-150961812.7XH159-10-1501067313.7XH159-11-1501173014.7XH159-12-1501279816.0XH159-12.5-15012.581016.2XH159-13-1501384116.8XH159-13.4-15013.486317.2XH159-13.7-15013.788617.6XH159-14-1501489817.8XH159-15-1501595318.9XH159-16-15016100819.9XH180-8-150180848513.85.315037MnXH180-10-1501087516.1XH180-12-1501266518.3XH180-15-1501579521.6XH180-20-15020102027.2XH180-21-15021106628.3XH180-21.6-15021.6109229.0XH180-22.3-15022.3110529.4XH219-20-1502192069827.86.115037MnXH219-25-1502584832.8XH219-27-1502790834.8XH219-36-15036117843.9XH219-38-15038123845.9XH219-40-15040131047.8XH219-45-15045144852.9XH219-46.7-15046.7149854.6XH219-50-15050159857.9Question 1 What is material? Answer: It is SteelQuestion 2 How about working pressure? Answer: Customer needs provide this data because requirements are different for different countries.