ITEM NAME:Adjustable Plug Tester High Energy Ignition S Park Plug Tester Wire Coil Ci H3E8 Adjustable Plug Tester High Energy Ignition S Park Plug Tester Wire Coil Ci H3E8 According to spark color and flash over distance to determine the quality of the coil Can intuitively convenient to understand the operation of the ignition coil Alligator clip securely fastens to ground Screw assembly adjusts spark gap quickly and easily Avoid fire, the ignition coil burned out and so on size: 9.5*17.5*3cm Cable length: 52cm Color: Black Package included: 1* Adjustable Spark Plug Tester.1 Adjustable Spark Plug Tester. Can intuitively convenient to understand the operation of the ignition coil. Avoid fire, the ignition coil burned out and so on. Cable length: 52cm.