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Draper Draper GPT/12-24V Glow Plug Tester 12-24V
This is a self-calibrating, easy to use glow plug tester, suitable for both steel and ceramic glow plugs, enabling fast in-situ diagnosis of glow plug failure on 12V and 24V DC diesel engines. These indicators provide easy to interpret and precise data every time. The built-in reverse polarity protection delivers safe usage for both the professional vehicle technician and the keen DIYer.