The Wave headset is simplicity at it's finest. Including a mid-stack 16mm topcap and x2 3mm spacers, this sleek looking headset allows you to dial in your front end with no fuss. Includes two 3mm spacers Variable stack heights between 16-22mm possible Specifications Bearing TypeSealedColorOil SlickCrown Race30Defined ColorBlackS.H.I.S LowerIS42S.H.I.S UpperIS42S.H.I.S. Stem Clamp Diameter28.6 ThreadlessUpper Stack Height6