CNG cylinder of Type I: We are one of the main manufaturer in China to export seamless steel gas cylinders,CNG cylinders for vehicle (including TYPE I and TYPE II) ,high purity gas,valves and other related products. Our products are widely exported to Middle East,Thailand, Asia,Africa,America and some Europea countries.With high quality and best service,we have got praise from all our customers over the world. Specifications: OD: 232/279/325/356/406mmWater Capacity: 20-130LWorking Pressure: 200bar Testing Pressure: 300barStandard:ISO11439-2000 Material: 34CrMo4 We can provide you : 1).supper high quality CNG cylinders 2).lowest price in the market 3).fast delivery (2-4 weeks) and best service Pls do not hesitate to contact us for more details.