Protect your connections when you don’t have a battery installed with this Battery block for use with front or rear SRAM Red eTap AXS derailleurs. Use in either front or rear derailleur.
This is the Shimano Ultegra Di2 Internal Junction 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 centre of…