Cane Creek 110 Ext Conv Bottom Blk 1-1/4", 44mm Head-Tube to 1-1/4" No-Compromise Premium Headset Series Tops and Bottoms Sold Separately As Part of Cane Creek's Tapered Hea dset Solution Cut in Cane Creek's Fletcher, NC Manufacturing Facility Top-Quality Polishing, Anodizing and Laser Etching in the USA 7075-T6 Aluminum Cup, Internally Contoured and Relieved to Minimize Weight and Maximize Strength Sealed Black Oxide Steel Cartridge Bearing "Dual-Seal" 7075-T6 Aluminum Crown Race for Maximum Sealing Efficiency Internal Parts Are Cross-Compatible Across 10, 40 and 110 series Consistent Stack Heights Across 10, 40 and 110 Series