Shimano EW90-A/B Di2 Junction Box Hook (Mounting Plate)

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Dura-Ace 9070 Di2 Shifter/Derailleur Compatibility: Shimano Ultegra Di2

Box. This box is referred to as the junction Box A and is located at the handlebars on a Di2 build. The box is available in either a three or five port ...

for Di2 electronic shifting systems with a removable battery.

Box. This box is referred to as the junction box "B" on a Di2 build. The SM-JC41 is for use with internal wiring setups and is the main center of e-tube Di2 ...