Shimano Di2 E-Tube Junction Box A (3 Port)
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This is the Shimano DI2 Dura-Ace E-Tube Junction 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 option, to accommodate either a one pair or two pair shifter arrangement.
This product is expected to arrive on Wednesday, August 19 2020