Shimano EW-SD300 E-tube Di2 electric wire, 800 mm, black

From Shimano:

• The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching, but provides effortless gear shifts
• E-tube STEPS EP8 uses a fully removable individual cable system enabling fine tuning with the correct cable length to each component for easy and tidy fitment
• EW-SD300 wires use a slim 3.45 mm diameter plug, they can be connected to EW-SD50 wires with the use of EW-AD305 adapter
• EW-SD300 individual wires are available in varying lengths, there is no need (or facility) to cut these cables
• Reliable and secure water resistant connectors