Jinan Grock Trade Co.,Ltd,,a company concentrating on diesel engine ,fuel injection pump,inejctor, plunger,nozzle,fuel pipe,testing bench,and kinds of fixing tools . Having been in this industry for about 20yeas, we are cooperating with more than 100 factories.we also have our own factory to produce nozzle, plunger and diese injector .We can guarantee quality,Quality is the core factor of enterprise success ,so.friends,so please trust us, and if you are interested in our products, please feel free to contact us.