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Specification: Colour: Black Material: ABS + copper Scope of application: car testing Product size: 112*22*22mm Notice: 1.The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding. 2.Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm) 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. Packing list: 1 X Spark Plug Tester #High Energy#Spark Plug#Tester Ignition#Coil Engine#Test Tools#Auto Diagnostic#Spark Plug Tester#Car Spark Plug Tester#Auto Spark Plug Tester#Tester Wire#Circuit Diagnostic#Vintage Tool