For use on both diesel & petrol engines to help diagnose common faults such as; worn piston rings, worn valves, cracked cylinder heads & blown head gaskets, using compressed air.Includes: Dual gauged leak detection unit, 0 - 100psi (0 - 7bar), to display both feed pressure & percentage loss.3 x 25mm long adaptors: M10, M12 & M14. 2 x 238mm long adaptors for deep seated plugs: M12 & M14.Adaptor hose (300psi) for diesel injection adaptors (as supplied in Laser Part No. 4510, 470mm long) & adaptor hose for spark plug testing on petrol engines (670mm long).Fixed short connection (M14 x 40mm) plus an assortment of O-rings/seals, & supplied in a blow mould carry case. NOTE: Cylinder being tested must be set & locked at TDC with both valves shut.