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If you put in a lot of miles and/or sweat a lot, your shifter hoods probably need freshening up. Grab a pair of Shimano Di2 STI Lever Hoods to make your bike feel new again. - Fits Dura-Ace R9170 Di2 levers

This is the correct plug-and-play wire for Shimano's E-Tube Di2 electric-shifting systems. It comes in sixteen different lengths, so choose the one(s) that's right for your Di2 E-Tube wiring configuration.