Shimano Dura-Ace FC-R9100 Left Crank Arm (Black) (170mm) - Y1VP98080
Shimano Dura-Ace FC-R9100 Left Crank Arm (Black) (170mm) - Y1VP98080, Shimano Dura-Ace Left Crank Arms Specs: Color Black/Silver Spindle Interface Type Hollowtech II Length 170mm or 172.5mm