Skyjacker Softride Nitro shocks are 150 PSI Nitrogen Gas Pressurized. They feature multi-stage velocity sensitive valving, twin tube construction, oversized piston head, internal rebound bumper, 5/8 diameter hardened double chrome rod, urethane bushings & compression control which prevents the formation of air bubbles to reduce fade. Skyjacker has set a high standard of uncompromising quality in the development of this high-performance shock absorber. Best used for severe off-road applications as its a little stiff for street use. All shocks are white and include a red polyurethane boot. Important note: These shocks are for suspension lifts only. Shocks will not lift vehicle. *Shocks are sold individually.