We are a professional manufacture of semi trailers and trailer parts , such as : 1.Axles (American and German , BPW and FUWA type , spokeaxle , low loader , concave axle ) 2.suspension (bogie , spoke bogie , American suspension and german suspension ) 3.fifth wheel（2”and 3.5”） 4.King pin (2”and 3.5”, weldable and bolton) 5.landing gear (inboard gear and outboard gear ) 6.other components like twist container locks , screw locks , brake chamber , wheels and other components are available .