Backed by a 110-year warranty and constructed in Fletcher NC the 110-Series headset is designed with no compromises in quality durability or finish quality. External cups press directly into the frame's head tube.Sealed stainless steel bearingsCarbon-friendy compression ring captured in top cover keeping shims in place7075 T-6 aluminum cups machined in Fletcher NCAluminum dual seal crown race protects lower bearingInterlok spacer compatible110 year warrranty