Adjustable Spark Plug Tester High Energy Ignition Spark Plug Tester Wire Coil Circuit Diagnostic Autos Diagnostic Test Tool Specification: _x000D_ According to spark color and flash over distance to determine the quality of the coil. _x000D_ Can intuitively convenient to understand the operation of the ignition coil. _x000D_ Alligator clip securely fastens to ground. _x000D_ Screw assembly adjusts spark gap quickly and easily. _x000D_ Avoid fire, the ignition coil burned out and so on. _x000D_ Length: 11.5cm _x000D_ Diameter: 2.2cm _x000D_ Cable length: 51cm _x000D_ Color: Black _x000D_ _x000D_ Package included: _x000D_ 1pcs x Adjustable Ignition Coil Tester _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_