Hi, can anybody comfirm what these are suited to? DENSO Irridium, have also seen them on ebay for sale out of the US. Part no. SK20R11. My brother in law used to work for Toyota spares and he thinks they maybe for an Aurion. Looking at comments on this thread, the correct part number should be FK20HR11. He gave them to me in a Toyota Genuine Spare Parts box. Thanks.