... :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 ... locks ,brake chamber ,wheels and other components are available . Fuwa type 14 trailer steering axle