Shimano EW-AD305 SD300 to SD50 Wire Conversion Adapter

Shimano part number: EW-AD305. Shimano SM-PCE02 PC interface device for E-tube / E-Bikes / Di2 - SD50/SD300. Shimano CN-M9100 - Dura-Ace / XTR - Sil-Tec 12 Speed Chain - 126Link. SRAM Apex D1 - 12 Speed Flattop Chain - 120 Links.