Automobile Spark Plug Tester 0-6000rpm Dual Hole 12V Engine Ignition Coil Tester

Can be adjusted as you required. The power is less than 6000RPM; the maximum power of the tester is 6000RPM；. Why is Spark Plug Tester Needed?. The test height of the tester is equal to 36mm; most spark plug specifications are 36mm.