FSA Orbit MX threadless headset features TH brand 36 degree angular contact sealed bearings. TH Brand 36 degree Angular Contact sealed bearings. Forged and CNC machined 6061/T6 aluminum cups. 7075 alloy crown race. Patented alignment tip for increased durability and performance. Laser etched aluminum top cap. EC34/28.6 (36x36) | EC34/30 (36x36). Item Specifications: Color: Black, Crown Race: 30, Defined Color: Black, S.H.I.S Upper: EC30, S.H.I.S Lower: EC30, S.H.I.S. Stem Clamp Diameter: 28.6 Threadless,