These are for those who don't want to cut into there nicely painted fender's, or anything else when using cup washers. robs z-spec goodies buy. Took 7-8days to arrive. I hand previously made something similar from an old fuel tank cover o'ring, these are better, and fit the washer perfectly. Be wise to check the size of the cup washer with rob. http://www.ebay.com.au/itm/10-Pcs-Oil-Seal-O-Rings-Black-Nitrile-Rubber-19mm-OD-4mm-Thickness-/151030807764?pt=AU_Business_Industrial_Industrial_Supply_MRO&hash=item232a233cd4
