This Air Lift replacement sleeve is an exact replacement for your original Air Lift air spring. It is made with sturdy rubber construction and synthetic fabric reinforcement. This sleeve has an inflated proper ride height of 4.0 to 6.0 inches and a maximum diameter of 4.6 inches. Genuine high-strength rust-proof Zytel endcaps and an inverted crimp design help the air spring hold shape for a long life. This replacement air sleeve is covered by a limited lifetime warranty.