Home Products Headsets P/No:LH-81: Threadless Headset LH-81 P/No:LH-81: Threadless Headset Threadless HeadsetsP/N: LH-81EC30/25.4 or EC34/30Alloy; Ball RetainersTop Nut: 1 1/8"Cup O.D.: 34Crown Cone: 30Stack Height: 43mm 1448305