We supplier CNG Steel Cylinder as follows: (1) CNG TYPE-1 cylinder (2)CNG TYPE-2 cylinder Standard: ISO11439: 2000, DOT,BS,JIS,DIN,TUV Material: 34CrMo4, 30CrMo, 37Mn, 35CrMo, and so on. OD: 229mm/232mm/267mm/273mm/279mm/306mm/325mm/356mm/406mm Water capacity: 40L, 45L, 50L, 60L, 70L, 80L, 90L, 100L, 110L, 120L etc We have our own CNG cylinder pipe factory and we could also persuade other Chinese cylinder mills to produce cylinders for us if the other special size / use . We can offer high quality products, professional services ,competitive price & reliable business partner. Standard export packing