Shandong zhongtie metal products co , ltd is a professional manufacturer and trader of fuel injection system parts for diesel engine system , our main products include s series , p series and dn series injector nozzles plunger , delivery valve , common rail control valves , more than thousands of types of products can be matched for mainly types of diesel enginesHigh performance products and good service make the customers from all over the world trust us , products are supplied tomany oem companies in domestic market and abroad . welcome customers from all over the world tohave cooperation with us and develop together