Useful tool: This spark plug tester can test your spark plug condition, so you can know if you need to replace it. Simple to use: Simply connect the spark plug and the tool, and can determine the spark plug condition via the spark color and flash distance. Portable: This ignition coil detector is small and compact, and 't take up much space, so you can easily carry or store it. Long lifespan: This diagnostic tool is made of ABS and metal, and it is strong, sturdy and is not easy to be . Good replacement: This car spark plug detector is long-lasting and reliable to use, so you can use it to replace the worn or . Colour:Photo Color Material:ABS Package Contents: 1set x Spark Plug Teste Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.