REVOLVER HEADSET - Features: CNC 6061 Aluminum bearing cover with tear-drop slots for style and triple rubber seals for a perfect fit. Campy spec 45°x45° sealed bearings, 15mm tall dust cover, Chromoly crown race - Materials: Aluminum Cover, Chromoly Crown Race - Bearings: 45°x45° Campy type - Color: Anodized Black - Weight: 2.7oz. (76.54g)