Hendrickson part number S-40879-2, also referenced as S408792, is a genuine Hendrickson brake component for heavy-duty suspension systems. Hendrickson is a recognized name in commercial vehicle suspension and brake hardware, and this part is sold directly through Pro Gear and Transmission. If you need help confirming this is the correct part for your application, give us a call before ordering.FeaturesGenuine Hendrickson brake componentPart number S-40879-2, also known as S408792Designed for heavy-duty commercial vehicle brake and suspension systemsSold by Pro Gear and Transmission