Product Details: The ContiTech Air Spring 64285/3B12-303/4434 ensures you are Ready for the Road Ahead™ maintaining the steady capability to lower or raise the truck's body height to match a ramp's elevation or to set up a suitable platform. These air springs also achieve persistent and low natural frequency between tare and full load. This ensures effective cargo protection, even on poor road surfaces, excellent comfort and health protection for the truck driver, and safe driving conditions. 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®.