Air Helper Spring SumoSprings SumoSprings; Solo Kits Are Replacements To Factory Bump Stops; Capacity 3000 lbs. At 50 Percent Compression; Do Not Exceed GVWR; No Drill Required; Black; SPECIFICATIONS: Max Load: 3000 lbs. FEATURES: Sold as a pair left and right Requires no maintenance; Proudly made in the U.S.A. Enhances Load Carrying Ability 2000 Pounds Capacity At 50 Percent Compression Reduces And Stabilizes Sway Improves Overall Driver Control And Ride Comfort Compress Up To 80 Pct Original Height With Full Memory Rebound 1 Pc. Attached On Top/Bottom Will Stretch 50 Pct Of Body Height Progressive Spring Rate Made From Proprietary And Patented M SumoSprings(R) are a patented suspension product designed to enhance load carrying ability, stabilize sway, and improve overall driver control and ride comfort. They are maintenance free, do not leak air, and do not require airlines or compressors. SumoSprings(R) are manufactured in a variety of heights, diameters and densities to support multiple front and rear applications. They are manufactured from proprietary closed micro-cellular urethane providing a smooth and progressive spring rate. SuperSprings International Inc, is a manufacturer and distributor of Front SumoSprings and Rear SumoSprings - the world's first airless airbags; SuperSprings - the unique, self adjusting leaf spring suspension enhancers; SuperSway-Stops - the simple solution to reducing camper body-roll; SuperCoils - the heavy duty, replacement front end coil springs; SuperKeys - the forged torsion keys for lifting and leveling the front suspension while maintaining your ride quality.