Features: brand new and high quality Quick diagnosis of all ignition system problems, for spark plug and power cord connection tool. The normal spark emitted by the pyrometer, such as "purple blue 2cm straight line", will be red or bent if the ignition coil is broken. Use this ignition tester to check the condition of the ignition system on each cylinder without resorting to expensive mechanics. The spark tester connects the for spark plug and the for spark plug wire in a few seconds to troubleshoot dirty for spark plug connections, broken points and cables or poor connections. Connect in seconds. Adjust the spacing according to the engine compression ratio the normal spacing is 0.8-1.5cm. Specifications: Mateiral:Plastic Car Sparking Plug Length:Approx.15cm/5.90in Cable Length:Approx.50cm/19.69in Net Weight:100g Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Car Sparking Plug