we are offering f-208sw threaded headset. f-208sw specification:ec3428.6-26tpiec3430alloy, ball retainerstop nut: 25.4cup o.d.: 34crown cone: 30height: 32.6mm f-218sw specification:ec2925.4-24tpiec2927alloy, ball retainerstop nut: 22.2cup o.d.: 30crown cone: 27height: 30.4mm