Cane Creek 110 Series Headset.
Features:
110-Series features the strongest materials, most effective seals and the best aesthetics with a 110 year no-questions-asked warranty
Contoured and relieved 7075-T6 aluminum for minimized weight and maximized strength, with split-lip sealed stainless steel bearings
Low friction, dual-seal crown race and top cover provides maximum sealing from contaminants, plus a captured compression ring design for carbon steerer compatibility (Interlok spacer compatible, sold separately)
Cane Creek Integrated 41.0mm ID (36x45), Campy Hiddenset 42.0mm ID (45x45) , ZS (ZeroStack), or EC (traditional, External Cup) available for 1", 1-1/8" and tapered steerers
Internal parts are cross-compatible across the 10, 40 and 110 series