gas cylinder Aluminum Alloy Seamless Gas Cylinder is featured for some unique strong points. ... gas.Specification: Outside diameter(mm): Service pressure(Mpa): 15Mpa-25MpaCapacity(L): 0.2,0.28,0.4,0.5,0.7 ... ,7.0,8.0,10,12,13.4,15,20, Aluminum Alloy Seamless Gas Cylinders