Trailer Axle, Trailer Suspension, Truck Parts manufacturer / supplier in China, offering 12t BPW Axle Parts Return Spring Slack Adjuster Spring 0339733120 Retaining Spring, Original Factory Truck Trailer Parts BPW 12t Adjusting Arm Return Spring 05.397.26.03.0, Replacement 0539758030 Trailer Truck Return Torsion Spring for BPW 12t Return Spring and so on.