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One-piece construction for faster
Manufacturer Part Number: W095-0011
Manufacturer Part Number: CU0SWB44
149969-Q1-LRET
Shimano EW-JC304 Di2 Junction Box - 4 Ports, Use With EW-SD300 Belt Drive Parts & Tools One-piece construction for fasterShimano Di2 Frame Junction Box Frame Junction Box connects via SD50 E tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and 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 from http: e tubeproject. shimano. com Product Specifics Today's Stock
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