The Cane Creek 40 IS42/28.6 Headset 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. Cane Creek 40 IS42/28.6 Headset Features 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 Dependable black oxide, sealed bearings Interlock spacer compatible Internal parts are cross -compatible across the 10, 40 and 110-series