Shimano EW-SD50 Di2 E-Tube Wire
$27,93
Shimano
Shimano E-Tube wires and connectors Frame grommets for E-tube internal-wiring compatible frames are sold separately, see Shimano Frame Grommet Kit Electronic Shifter Extra Parts Ultegra Di2 wires utilize Shimano's e-tube technology; e-tube is a two-prong