This handlebar stem is constructed of high-strength CNC machined 6061 T6 aluminum alloy. It is suitable for handlebar with diameter 31.8mm.Features:Constructed of high-strength CNC machined 6061 T6 aluminum alloy.Frosting finish， exquisite workmanship.Suitable for handlebar with diameter 31.8mm.Four bolt bar clamp holds bar securely in position. Specifications:Material: Aluminium alloyColor: Black， Gold， Blue， Red， Silver (optional)Handlebar diameter: 31.8mmFork diameter: 28.6mmCenter distance: 32mmWeight: 126g / 4.5ozPackage List:1 * Bike Handlebar Stem