Shimano SMJC41 Di2

<div><b><font style="font-family: arial, sans-serif; font-size: 13px;">SM-JC41 - SHIMANO - Junction B - E-TUBE - Internal DI2 Wire Routing - 4-Port</font></b></div><div><font style="font-family: arial, sans-serif; font-size: 13px;"><br></font></div><div><font style="font-family: arial, sans-serif; font-size: 13px;">For internal DI2 wire routing, SHIMANO's SM-JC41 Junction B is the central connector for DI2 systems. Wires from the front and rear derailleurs, cockpit area, and battery all plug into the 4-port SM-JC41 junction, which is housed inside the bike frame.</font></div>