Super-smooth steering, quality materials, cutting-edge design and serious durability are all hallmarks of Cane Creek's 110 headsets. • Technical Description: EC44/40/H12/x • Bottom Type: EC - External Cup • Bottom Head Tube Inside Dia.: 44.00mm • Crown Race Seat Dia.: 39.76mm • Crown Race Type: Aluminum, Dual-Seal • Bottom Stack Height: 12mm • Bottom Bearing Type: Top-quality, sealed stainless steel bearings • Material: 7075 aluminum • Weight: 61.02g