An individual diesel compression test adaptor (dummy glow plugs) for use with Laser compression and cylinder leakage kits (Part Nos. 2596, 4510 and 5140). Also suitable for use with many other common compression test kits, increasing the range of applications available. Applications include: Alfa-Romeo, Fiat, Ford, Lancia, Suzuki, Opel/Vauxhall 1.3L and VAG 2.0L PD TDi. Engine Applications include: 1.3 JTD, 1.3 TDCi, Z13DT, DTH and DTJ. Glow plug applications include: NGK Y8003J, CZ304 and YE14. Thread size: M8 x 1mm, 124mm total length, thread to seal 47mm. Use with Part No. 4510 diesel compression test kit and Part No. 5140 cylinder leakage tester.