(2x) High-Strength Carbon Steel Add-A-Leafs(4x) Vibration Poly Isolator PadsInstallation instructions21.5" Long x 2.5" Wide Helper SpringsRear Lift Height: 1.5" to 2"**The overall Lift Height Achieved is influenced by your truck's spring pack condition.Supreme Suspensions Rear Add-a-Leafs are manufactured from heat treated & tempered high strength spring steel, precision laser cut for outstanding performance and quality. Each leaf spring is flex powder coated to prevent cracking, corrosion and rust and includes vibration poly isolator pads for quiet and smooth ride. Our Add-A-Leafs are designed to provide an evenly distributed spring rate, improve the common factory leaf sag caused by heavy loads and also enhance vehicle reliability when towing.NOTES: An alignment is always recommended after altering the height of your vehicle.