Threaded 1 inch x 24T headset in classic shape for modern high end road bikes.For use with threaded steerers and quill type stemsForged and CNC machined 6061-T6 aluminium cups, patented alignment tip for increased durability and performanceTH brand 36 degree micro angular contact bearings (red seal) and 7075-T6 crown raceStack height: 27.5 + 13.1 = 40.6mmItalian: 22.2 x 30.2/26.4Colour: SilverSize: 1 inchWeight: 95g.