Interlok spacers feature grooves that mesh the top cover of the headset and the spacers together. This allows them to act as one unit, making the steering assembly more rigid while still allowing easy height adjustment. Interlok spacers are available in 5MM and 10MM sizes in colors to match 110-Series headsets.Item SpecificationsColorBlueUnit of SaleEachMaterialAluminumThickness10mmS.H.I.S. Clamp Diameter28.6