ITEM NAME:Auto Car Spark Plug Test Pen Car Test Pencil Spark Plug Tester Tools ghf JLB Descriptio n Material: ABS Colour: Black Size: 9.5*17.5*3cm Weight: 0.1kg Model: spark plug tester Scope of application: car testing Features: 1. Professional design - Determine the quality of the coil based on spark color and flash distance. 2. Value - Visually understand the operation of the ignition coil. 3. Better and faster - this is the fastest way to test for no-boot.Model: spark plug tester. Perfect choice - The screw assembly quickly and easily adjusts the spark gap. Avoid fire, ignition coil burnout, etc. Better and faster - this is the fastest way to test for no-boot conditions.