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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.

Shimano Di2 STI lever hoods. - Fits Ultegra ST-6870 Di2 levers only

- Replacement chain pins for Shimano 11-speed chains - Compatible with CN7900/7801 chains - 3 pins per pack

Shimano Di2 External Battery Mount - All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions - Use Di2 system checker to update component firmware