Trail Tech offers world-class products and affordable value. As a Powersport manufacturer, they commit to providing the best quality, competitive prices, short lead times and personal customer service. Trail Tech will continue to invent and develop improved, quality products for the benefit of the Powersport community. CHT (Cylinder Head Temperature) Sensor for air cooled machines. Sold individually. Detailed Specifications: Engine temperature: For air-cooled machines; attaches to spark plug or engine bolt. Wire length: 550 mm / 21". Diameter: 10, 12 or 14 mm.