The Denso U-Groove Standard Spark Plugs 5018 QJ16HR-U are high-quality ignition components designed for optimal performance. Made with nickel and copper materials, these spark plugs offer reliable and consistent spark delivery. With a length of 14 mm, they are designed to fit standard spark plug configurations for easy installation. Trust in the Denso brand to provide durable and efficient spark plugs for your vehicle's ignition system.