The Prophecy Internal (semi-integrated) Aluminum headset features aluminum cups, sealed bearings, aluminum top race, fork race and an aluminum top cap.

SPECS:SIZE: 1-1/8″ step-down to 1″ (1-1/8″ cups for 1-1/8″ head tubes with step-down spacing to specifically fit 1″ forks)
STYLE: Press-in Internal cups
INCLUDED- Aluminum cups, sealed bearings, fork race, aluminum top race and star nut with bolt.

NOTE: Star nut, bolt and top cap may not be needed if your fork has a built in compression bolt.

Weight:
Without star nut, top cap and bolt: 3.2oz/92g
With star nut, top cap and bolt: 4.15oz/117g