Description: [Adjustable Angle]:This mountain bike stem riser features an adjustable angles to meet your handlebar height needs,to achieve a more comfortable riding position. [Premium Material]This bicycle stem riser is made of aluminum alloy,ultralight,high strength,and solid. [Easy to Install]:Connect up the front fork stem, for bolt bar clamp holds the bar securely. [Compatibility]:Fit for bike fork diameter is 28.6mm (1-1/8") and the handlebar diameter is 31.8mm (1-1/4") before order! [Widely Used]:The bike handlebar stem is suitable for most road bikes,fixed gear bicycles,mountain bikes,downhill bikes,track bikes,etc. Specifications: Material: Aluminum Alloy Size: Hole Center Distance Length:10cm/3.94inch,Total Length:15cm/5.91inch,Handlebar Diameter:3.18cm/1.25inch,Fork Diameter:2.86cm/1.13inch Note: Please allow slightly errors due to manual measurement and different monitors. Package included: 1 Bike Stem