The all-new 40-Series is the work-horse of Cane Creek's headset line-up. The series incorporates all the features necessary for a durable, light-weight, long-lasting headset and represents the perfect balance of performance, durability and value.•Machined from 6061 T-6 Aluminium•Innovative Clip-Seal completely seals the top assembly and captures the compression ring to reduce the numberof loose parts•High quality, low friction face-seals•Durable steel crown race•Dependable black oxide, sealed bearings•Interlock spacer compatible•Upper/Lower stack: 9/1mm•Colour: Black•Weight: 71g IS41/28.6|IS41/301.1/8" intergrated lower and upper