Shimano Sm-jc41 Junction Unit

The Shimano Junction B - E-TUBE - Internal DI2 Wire Port 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.

Specifications

• Series: DURA-ACE R9150 Series
• E-tube port: 4
• SD50 Port (pcs): 4