E-TUBE Electric Wire.Available in lengths from 150 to 1600mm, the SD50 E-TUBE wire transmits interactive signals and provides power to E-TUBE DI2 drivetrains. With a compact, waterproof connector, it can be easily routed internally in handlebars and frames thanks to its "plug & gap" connection.Features:Transmits interactive signals and power supply to each electronic components by “plug & gap” connectionCompact and waterproof connectorEasy to insert into frameCable length 150 mm - 1600 mmWith cable tie type for built-in cable routing (EW-SD50-I)