CNG Type 1 Tank DOT Certified 3,000 PSI Model CNG1158-1 and Tank Valve Specifications 5.6 GGE @ 3,000 psi. Liquid Capacity 70 Liter 11" Diameter x 58" Long with Valve Weight 150 lb You will have to measure your vehicle and order the tanks that best fit your vehicle. We cannot select tanks for you. The GGE rating for these tanks is the maximum capacity under ideal conditions. You may not be able to fill to the rated capacity. You may only be able fill to .5 to 1.5 GGE less than the rating depending on the size of the tank. If a CNG tank is installed in the trunk or inside a vehicle you must vent the PRD with metal tubing, and bag and vent all fittings from the neck of the tank to the vent fitting. Order our vent kit model CNGVBK, if needed.