Campagnolo Record headset, 1" threaded (26.4mm) Bearing Type: 5/32"-3/16" BallCrown Race: 26.4Headset Detail Color: SilverHeadset Size: 1"Headset Type: 1" Standard CupsMaterial: AluminumStack: 36.5mmStack Height: 38mmSteer Tube Size: 1" threadedWeight: 104gWeight: 105g