We are a professional manufacture of semi trailers and trailerparts , 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.fifthwheel2and 3.5 4.King pin (2and 3.5, weldable and bolton)5.landing gear (inboard gear and outboard gear ) 6.other componentslike twist container locks , screw locks , brake chamber , wheelsand other components are available .