The 110 Ceramic 30th Anniversary headset is Cane Creek's most premium headset for ultimate smoothness and longevity. Built around the new Hellbender Ceramic bearing and backed by the Cane Creek 110 guarantee, they promise to replace any part of a 110 Ceramic if a rider is dissatisfied with its performance - no questions asked - for as long as they own it. This is the headset for the rider who wants nothing but the best. Precision engineered and hand built by Cane Creek in Fletcher, NC.Stack height: 8mm or 15mm Top / 4mm BottomAngular design with dual-stage anodized machine cuts on top cover and cups to reduce weightPremium Hellbender silicon nitride ceramic bearings with 440C stainless steel races offer smoothness and longevity Premium 7075 T-6 aluminum cups and cover with high polish finishUpper headset bearing protected by two layers of seals within the top coverLower bearing protected by dual-stage rubber lip seal co-molded onto crown raceIncludes matching top cap with carbon-friendly compression ring, (1) 10mm Interlok spacer and (2) 5mm Interlok spacersItem SpecificationsColorCane Creek BlueCrown Race40Defined ColorBlueLower Stack Height4MaterialAluminumMaterialCeramicMaterialStainless SteelS.H.I.S LowerZS56S.H.I.S UpperZS56S.H.I.S. Stem Clamp Diameter28.6 ThreadlessStack Height12Upper Stack Height8 Cane Creek 110 Ceramic 30th Anniversary Headset Headsets UPC: 840226030128