Increases safety,Made from patented micro-cellular urethane,1800 Lb Capacity At 50% Compression,Compress Up To 80 Pct. Of Original Height w/Full Memory Rebound,Maintenance-Free,Reduces overall cost of ownership,Improves Overall Driver Control And Ride Comfort,Progressive Spring Rate With Superior Damping Properties,Sold As A Pair [Left And Right],Reduces And Absorbs Vibration,Will Not Leak Or Rupture,Never Load Any Vehicle Beyond The Manufacturers GVWR