This project is an engine ignition tester made with scientific design and excellent craftsmanship. Made of material, not easy to damage and break, can serve you well. Can effectively help you prevent safety hazards, and clearly and intuitively help you understand the fire coil or high-voltage wire status. Features -Color: Black. -Material: ABS, acrylic, aluminum alloy. -Size: About 14.00X2.50X0.50cm/5.50X0.98X0.20inch. -You can easily adjust the spacing you need through the knob to achieve better test results. -This product is designed to simulate the combustion conditions of the spark plug in the cylinder. -The transparent observation window is convenient for observing the situation. -With simple design and sturdy structure, easy to observe and easy to operate. -Made of safe and durable materials and can provide you with a good experience. Package list: 1 x tester 1 x testing wire (55cm)