Sold As A Pair [Left And Right]. Maintenance-Free. Enhances Load Carrying Ability. 1800 Lb Capacity At 50% Compression. Reduces And Stabilizes Sway. Improves Overall Driver Control And Ride Comfort. Compress Up To 80 Pct Original Height With Full Memory Rebound. One-Piece Unit Attached On One Side Used As A Replacement. Upgrade To Factory Bump Stops. Made From Proprietary And Patented Microcellular Urethane. Will Not Leak Or Rupture. Never Load Any Vehicle Beyond The Manufacturers GVWR.