This is a new condition, single-piece (1PC) spark plug tester designed to diagnose ignition issues in automotive engines. It comes with free shipping. The tool helps check spark plug firing strength and consistency, making it useful for DIY mechanics or professional technicians performing routine maintenance or troubleshooting. By quickly identifying weak or faulty spark plugs, it can help improve engine performance and fuel efficiency. It is a practical diagnostic instrument for general automotive use. Please check the listing for full details on compatibility and operation. 1PC Spark Plug Tester Car Spark Plug Tester Car Ignition Analyzer For Automotive. Condition: New. Listed at 7.98 USD. Worried about whether your car's ignition system is working properly?. High - Quality Mixed Material : Made of a combination of stainless steel and plastic. The plastic part provides a comfortable grip and good insulation, ensuring safe use.