Shimano Di2 BT-DN300 Di2 Internal Mount 3-Port Battery - NEW 12 Speed Shimano Battery
Shimano Internal 2-Port Junction for EW-SD300 with new electric wire SD300. - Shimano E-Tube JC302/SD300 2-Port Junction in Black | Rutland Cycling
Shimano E-tube 4 port junction for EW-SD300. Includes updated new electrical wire. - Shimano Internal 4-Port Junction for EW-SD300 in Silver | Rutland Cycling