This is a NEW Stanadyne pencil injector for the later model John Deere 7520 tractors with the 6068HRW60 engines. It is not an aftermarket will fit or reman with eroded holes which lead to poor engine performance complaints such as hard start, rough running, smoke, and excessive fuel consumption. Stanadyne is the OE manufacturer supplying this injector to John Deere. The John Deere P/N's for this injector are RE48786, SE501101, or SE500827.