Shimano EW-JC304 Di2 Junction Box - 4 Ports, Use With EW-SD300
$36.64
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Shimano 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 SpecificsToday's Stock Status 10+ Available to ship in 2-4 Business Days UPC: 192790597195 EAN: Not available Manufacturer Part Number: Does Not Apply CY8903 154993-Q0-L
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