FSA Orbit C-40 ACB Integrated Headset (Black) (IS42/28.6) (IS52/40) - 121-0514
FSA Orbit C-40 ACB Integrated Headset (Black) (IS42/28.6) (IS52/40) - 121-0514, FSA Orbit Features: IS42/28.6 (45/45) | IS52.1/39.78 (36/45) Specs: Bearing TypeCartridge ColorBlack Defined ColorBlack Crown Race40 S.H.I.S LowerIS52 S.H.I.S UpperIS42 S.H.I.S. Stem Clamp Diameter28.6 Threadless