... CO., LTD., has reasonable structure,good braking quality,high-intensity,big rigidity,long life,as well as strong bearing capacity,and ... passed the national authoritative department's monitor. Trailer parts-King pin 2"Specification: 50mmThickness: 8mm/10mm/12mmISO 9001:2000TS16949 will be ... finished in June, 2012 Our King Pin series are popular sold to many countries in USA, ...