These rear double-convoluted Ride-Rite Air Springs will improve your ride and handling, increase traction, and reduce suspension fatigue. The adjustable springs have individual inflation valves, so you can level your truck when you are carrying off-center loads. The springs mount between the suspension and frame and are rated at 5,000lbs per set. Adjustable air pressure is 5 psi to 100 psi. Keeps your vehicle level and gives it stability. Load Leveling capacity of at least 3,200lbs - at the most 5,000lbs - per pair. Dimensions: 5.25 inch H x 5.70 inch in diameter. *(Please call with the make and model of your vehicle and we will be glad to help you get the right fit.)