This injector fits Lister Petter engine, model LPWS. There was 2 different injectors used on the LPWS engine a 21mm model and a 24mm model. This injector is the 24mm model, the difference is at the injector tip area. Check out the chart and drawing.
This is item 1 on the Lister Petter drawing
Look at these pictures and make sure your ordering the correct injector, there is a noticeable difference between the injectors
*Attention* Please note the fuel return line attachment points, there are 2, make sure your ordering the correct injector.
There are no returns on injectors or pumps that have been used and that smell like diesel fuel.