Shimano EW-JC304 Di2 Junction Box - 4 Ports for EW-SD300 Grain Free 5-inch blade crafted from hand-forged

5-inch blade crafted from hand-forged D2 steel with a protective powder coating

Mouse dimensions of 103x60x35mm

catering to diverse needs

EXCEPTIONAL ABRASION RESISTANCE: Reliable performance around rocks and structures

Shimano EW-JC304 Di2 Junction Box - 4 Ports for EW-SD300 Grain Free 5-inch blade crafted from hand-forgedDiscover the Shimano EW JC304 Di2 Junction Box, designed to enhance your cycling experience with seamless connectivity. This premium junction box offers a reliable solution for connecting various Di2 components, ensuring optimal performance on every ride. Connects via SD50 E tube wires to four key points: front derailleur, rear derailleur, cockpit junction box, and battery mount. Ensures all Di2 components operate with the same firmware version to