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