The X2 NGK Spark Plug IRIDIUM IX DR9EIX 4772 Pair is a set of high-quality spark plugs designed for motorcycles and scooters. Manufactured by NGK in Japan, these spark plugs feature a 12mm thread diameter, 18mm hex size, and come in a pack of 2. Compatible with various brands such as Ducati, Honda, Kawasaki, KTM, Moto Guzzi, and Suzuki, these spark plugs are an essential component for ensuring optimal performance and ignition in your vehicle. Upgrade your motorcycle or scooter with these reliable and long-lasting spark plugs.