Besnin Adjustable Mtb Stem Mountain Bike Stem For Bicycle, Road Bike, Mtb, Bmx, fit for:1 inch(25.4mm) or 1.25inch(31.8mm) handlebar. length?5.70in ( 145mm).Angle: 0~+90 adjustable Material: Constructed of high-strength CNC machined 6061 T6 aluminum alloy Advantages 1? It can be adjusted from 0-90 (you can also think of it as 90-180). it can be adjusted the height in the maximum range for the handlebar,giving you more riding options. Advantages 2. When your handlebar is 1 inch, please use the shim in the package. When your handlebar is 1.25in, no shim is required for installation Made of 6061T6 aluminum alloy , lighter weight, better toughness, no deformation, corrosion resistance, provide security for your outdoor travel. Bought this bike stem to enable you to convert an old MTB into a commuter bike.Suit for MTB ,BMX, DH, downhill bicycles, fixed equipment, road bikes, etc.