Trailer parts-King pin 2" Thickness: 8mm/10mm/12mm ISO 9001:2000 TS16949 will be finished in June, 2012 King pin series produced by our company QINGDAO JIN LI BO TRADE CO., LTD., has reasonable structure,good braking quality,high-intensity,big rigidity,long life,as well as strong bearing capacity,and also passed the national authoritative department's monitor. Trailer parts-King pin 2" ...