Brand x headset 44 56iiss sealedthe brand x 44 56iiss headset has an internal zero stack 44mm upper cup and an internal zero stack 56mm lower cup for use with a straight 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 95 1mmmaterial cnc forged and machined 6061 alloyshis norm zs44286 zs5630includes top cap and star nut buy