The HD Value Air Spring 64560/3B12-319/4413 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 and performance by helping reduce fatigue and increasing attentiveness. These suspension air bag replacements are engineered based on OEM specifications for appearance, form, fit, and functionality you can trust. 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. FleetPride is your First Click in Heavy Duty .