BikeMaster T3 Handlebar Mirror Adapters for Lever Brackets - 10mm - Black XF-1-60-0407 These adapters alllow you to fit mirrors to a bike without ugly sheet metal brackets They fit nicely to the back of standard brake or clutch brackets and look like OEM fitments Cast from lightweight aluminum and available in chrome, silver or black T2 and T3 fit 7/8in. diamter bars, avialable in 8 and 10mm