internal case
"practical case is small fits easily into the bottom bracket".
Couldn't load pickup availability

The SHIMANO Di2 internal junction box enables the connection of the various EW-SD50 cables of your electronic drivetrain system from the levers, battery and gear shift levers.
Fitted under the bottom bracket shell, this internal junction box works with Di2 MTB groupsets (XTR M9050).
Ref: 7970330771622
Group : Shimano XTR Di2
Fitting : Standard
Number of Chainrings : Single
Number of Chainrings : Double
Number of Chainrings : Triple
Speeds : 10/11
Overall rating: 5.0 / 5 from 2 reviews.
Review topics: [].
"practical case is small fits easily into the bottom bracket".
"Top quality-price ratio, fast delivery".