common rail nozzle or piezo nozzle is the key component of an injector. Our excellent quality common rail nozzles can replace the Bosch, Denso, Delphi, Caterpillar and Siemens original nozzles at the aftermarket. We use Posalux EDM for the spray hole drilling, Sonplas equipment for the flow rate control and high quality black coating process. You can find the best quality diesel fuel injector nozzles from F-Diesel China.