Brand x headset 44iiss sealedthe brand x 44iiss headset has an internal zero stack 44mm upper cup and an internal zero stack 44mm lower cup for use with a 1 18straight steerer it uses sealed angular contact bearings and has been designed to offer superior reliability quality and performance at an exceptional price point featuresangular contact sealed bearingsheight 91 1mmmaterial cnc forged and machined 6061 alloyshis norm zs44286 zs4430includes top cap and star nut buy