I bought this with a newish SW Motech Tank Ring Bag of the ION type. I recollect the owner said he had had it fitted on a Ducati Monster (sorry, he did not say what year), hence I would probably need an alternative ring for my 2013 CBR600F -- but when it arrived it seemed to fit fine. To be sure I gave it a quick blast of heat from my good ladies hairdryer, fitted it to the bike and left it overnight. It fitted faultlessly and continued to fit the CBR6 every time. It includes 4 spacers, which lifted the ring a little from the fuel filler surface and made fitting and removing the bag easy, and four longer bolts, although these are anodised yellow (they matched the Front Fork color on the CBR6). The anodising might polish off maybe, or a light sand might remove the color.............. The £12 price here includes free P&P to a UK Mainland Address.