Colortune / Compression Tester Thread Adapter Kit 14mm to 12mm with washer LSR8

This thread adapter kit can be used to convert the standard plug on Gunson Colortune's and on compression testers to the size below;

This kit converts the thread on colortune and Hi gauge compression tester to fit most popular sizes of spark plugs fitted to most modern and classic cars / bikes / boats etc...

Converts 14mm threads on Gunson compression testers as well as on Gunson colortune to a 12mm thread

Converts 14mm to 12mm for simple and accurate results