Set of 3 used DENSO iridium spark plugs, SXU20HPR11, as used in the original equipment. Even among iridium plugs, there are different types. These have a replacement cycle of 100,000 km. Removed from a Reiwa 6 model Hijet S510P with approximately 5,000 km of use. While these should be compatible with most KF engines, please confirm compatibility yourself.