Shimano Dura Ace RD-R9100 B-Axle 2 Direct Mount Rear Derailleur y5zr69000 Bolt
Shimano Dura Ace RD-R9100, RD-R9150 B-Axle 2 Direct Mount Type Rear Derailleur Bolt. Shimano Part# Y5ZR69000 Part in new but does not include original packaging. Please feel free to ask questions