This is a genuine AAM axle slinger. This goes on the outer stub axle where it butts up to the back of the wheel bearing hub assembly. This fits 2003+ Dodge Ram 2500 and 3500 series 4X4 trucks with the 9.25 American Axle Manufacturing front axle. We have also used these on Dana 60 Dodge stub axles. Shipping is $4.25 for USPS First Class Shipping or will be FREE if ordered with the stub axle.