For those of you who must have OEM these are genuine Yamaha washers nominally 6mm ID, 11mm OD and c. 1.2mm thickness. This set of four removed from a Yamaha XJ900S Diversion. No rust, and in good condition. Price is for four. Fit far too many Yamaha motorcycles to list here, and if you are reading this you have almost certainly put the part number into eBay so they fit your Yamaha as well! Please note that free UK postage and the reasonable cost that I charge for international postage does not include tracking.