Nitro Gas shock absorbers use a very proven twin-tube construction. The gas is stored in the outer tube, while the hydraulic oil passes between in the inner and outer tubes. What’s great about Nitro Gas is that it is a simple and highly-proven design. Nitro Gas is perfect for those who are looking to add a bit of lift to their vehicle, occasionally loading up the car for a camping weekend, enjoying some slow, low-range 4×4, or doing some on-road towing. Nitro Gas is also the most versatile shock absorber to fit in the widest variety of vehicles due to its slim design.