Fully Integrated Threadless Headsets P/N: LH-39S IS42/28.6 or IS47/33 Alloy; Sealed Bearings ACB: 45*45 degree Top Nut: 1 1/8" + 1 1/4" Bearing O.D.: 41.8 or 46.9 Crown Cone: 33 or 30 Height: 9.1mm