3 sizes of Compression Tester adaptor for specific automotive applications: 10mm, 12mm and 18mm.
They convert the thread on Colortune and Hi Gauge Comp and extends the use of your compression tester.
- 10mm Thread size: Suitable for most modern and classic cars.
- 12mm Thread size: Ideal for Two Stroke motorcycles and classic motorcycles
- 18mm Thread size: for 18 mm plug holes and Ford OHC engines
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