This handlebar stem is constructed of ultra light and strong 6061 T6 aluminum alloy. It is suitable for handlebar with diameter 31.8mm.Features:Constructed of ultra light and strong 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: Aluminum alloyColor: BlackHandlebar diameter: 31.8mmFork diameter: 28.6mmLength: 13cm / 5.1inWeight: 133g / 4.7ozPackage List:1 * Bike Handlebar Stem