Purchased for replacement as it has been running about 3,000km since the previous plug replacement. Since I am riding a 4-cylinder motorcycle and I need a plug as many cylinders as the number of cylinders, I chose this one which has excellent cost performance because I can not be able to get a high class product such as Windshield IRIDIUM or MotoDX. The photo shows the Plug after long distance and high speed driving. In terms of performance. It's a bit dry at the beginning. It's about a drop of about 1,000km, and I think it was probably safe to use it for another 1,000km. It's a good product with no complaints.