Cane Creek 40 is Short Top 42mm 1 1/8 Threadless Black 40-Series Represents the Perfect Balance of Performance, Durability and Value Tops and Bottoms Sold Separately As Part of Cane Creek's Tapered Hea dset Solution 6061-T6 Aluminum Cover Innovative Clip-Seal Seals the Top Assembly and Captures the Compression Ring Interlok Spacer Compatible Sealed Black Oxide Steel Cartridge Bearing Consistent Stack Heights Across 10, 40 and 110 Series Internal Parts Are Cross-Compatible Across 10, 40 and 110 series