Brand x headset 30eess 1 threaded loose ballthe brand x 30eess headset has an external 30mm upper cup and an external 30mm lower cup for use with a threaded 1 straight steerer it uses loose ball bearings and has been designed to offer superior reliability quality and performance at an exceptional price point featuresall steel loose ball bearings with sealsheight 36 1mmmaterial steelfor 1 threaded straight steerer tubesshis norm ec30254 ec3027 26 4finish polished buybrand