– Ultegra Di2 wires utilize Shimano’s e-tube technology; e-tube is a two-prong system and is NOT cross compatible with Dura-Ace 7970 Di2 wiring
– For use with Dura-Ace 9070, Ultegra 6770 & Alfine Di2 components
– All e-tube wires may be used for internal or external applications
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