The HD Value Air Spring 64306/1R12-567/8393 ensures you are Ready for the Road Ahead by offering a quiet, stable ride experience during changes in the vehicle’s weight, which are caused by load fluctuations. With heavy duty rubber bellows with more than 300 psi burst pressure, minimal wear and tear is experienced with the vibrations of the load fluctuations being isolated. Such isolation enhances drivers’ comfort by reducing fatigue and increasing attentiveness. These heavy duty air springs are engineered based on OEM specifications for appearance, form, fit, and functionality you can trust. FleetPride is your First Click in Heavy Duty .