For those of you who must have OEM these are genuine Yamaha washers nominally 4mm ID, 10mm OD and 1.0mm thickness. No rust, and in good condition. Price is for two. 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.