This suits: Nissan Patrol GQ Y60 & GU Y61 with TD42 and TD42T Engines.
This is the filter inside the injector pump.
It is located under the banjo bolt on the supply side of the pump approx 40mm down.
Often people rip the gauze filter and spring out and throw them in the bin. If your keen to make sure your injectors don't get any super fine particles in them then this gauze filter and the spring (listed separately) are a must.