Original Pinarello Dogma 65.1 headset carbon top cap.
The 65.1 top cap does not fit previous model Dogma 60.1 and Dogma 2
Perfect fit for the 65.1. Better finished than most generic top cap available and has a rubber gasket for better seal. Serves its purpose well. The only thing going against it is its price, consistent with the frame cost though so what can you do.