CNG cylinder, big capacity, light weight, good performance to resistance pressure cycle, cleanliness and energy economizing CNG cylinders:CNG steel cylinder for vehicleApplication Standard: ISO11439 Temperature Range: -40~65 oCFilling Medium: Compressed Natural GasCylinder Material: 34CrMo4.this type of cylinders can be widely used in cars,trucks,buses and so on CNG steel cylinders for vehicle