• Integrated style bearings fit directly into headtube.
• Patented alignment tip for increased durability and performance.
• 7075/T6 alloy crown race Laser etched aluminium top cap.
• FSA Part Number 121-0320 (1")
• FSA Part Number 121-0327N (11/8")

Not sure if this is the one you need?
Check out the handy FSA Headset ID Tool here http://www.fsaeasyheadset.com/