Product Details: Update the ride quality of your semi to be soft and smooth, with the Sampa SP 558709-KP Single Rolling Lobe Piston Air Spring for Hendrickson that ensures you're Ready for the Road Ahead™. This replacement air spring with a bellow-like design inflates or deflates to lift or lower the ride height of a vehicle to optimize comfort, handling, or other features. Engineered with tight seals to dramatically reduce air leakage while offering reliable suspension. FleetPride knows you need quality suspension and steering parts to reduce wear and tear and ultimately, downtime. Whether you need cab, truck or trailer air springs, we have the heavy duty air bags you need for a quiet, stable ride. FleetPride is your First Click in Heavy Duty®.