BANNER VESSEL CNG Type 2 Tanks (a.k.a. CNG Type 2 Cylinders) are made of steel liner with a composite wrap (usually glass fiber) around the center portion of the liner. With composite choice of glass fiber, the total weight of the tank is roughly 13 - 20% less than the same volume Type 1 Tank. Taking advantages in weighting comparing with Type 1 Tanks and advantages in cost comparing with Type 3 and 4 tanks, this is an ideal choice for passenger vehicles like Sedan, SUV, School Buses, Transit Buses and other vehicles that have certain weight limits.