Classic shape with modern styling for high-end road bikes Forged and CNC machined 6061/T6 aluminium cups Patented alignment tip for increased durability and performance TH brand 36 degree Micro Angular Contact Bearings (red seal) Laser etched aluminium top cap 26.4 diameter alloy crown race FSA Part Number 121-0025 Not sure if this is the one you need? Check out the handy FSA Headset ID Tool here