Shimano Ultegra 11 speed Jockey Wheels 6800

Shimano Ultegra 11 speed jockey wheels.
Fits derailleurs with both long and short arm, and both mechanical and Di2.
Original spare spart for RD-6800-SS, RD-6800-GS, RD-6870-SS and RD-6870-GS.
11 teeth.