... , Single Multi leaf spring 3.Used for: Truck, Traile TRA American Leaf Spring:1) Marerial: SUP7, SUP9, SUP9A, SUP10, SUP11, SUP11A ... /2000 /TS16949 control system6) Application: trucks, trailers, buses, cars, 4wd & light commercial vehicles, etc. TRA American Leaf Spring