Inline Spark Plug Tester with Straight Boot and Red Indicator Light

<p>An inline spark plug tester for checking whether your ignition system is producing spark. It connects between the spark plug and the ignition wire or coil. When the engine runs, the clear body shows a flashing red light if ignition current is present.</p><ul><li>Transparent body with a red indicator coil</li><li>Straight rubber boot and flexible insulated wire</li><li>Metal connector tip</li><li>Works on cars, trucks, motorcycles, lawn mowers, chainsaws and other small engines</li><li>Approx. 4.92 in tall, 4.84 in wire length, 2.75 in boot</li></ul><p>It needs no batteries and fits easily in a toolbox. Each unit is one inline spark plug tester.</p>

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