The Iridium IX Spark Plug BKR5EIX-11 by NGK is a high-quality spark plug designed for gasoline engines. With an iridium electrode tip and a heat range of 5, this spark plug offers reliable performance and improved efficiency. The 16mm hex size and 3/4" thread reach make it easy to install, while the solid terminal configuration ensures a secure connection. Made in Japan, this spark plug is a top choice for motorcycle and scooter enthusiasts looking for durability and superior ignition.