[Only Fit for Handlebar diameter 31.8mm (1.25\\) front fork stem diameter 28.6mm (1-1/8") Length: 110mm (center distance of the handlebar hole and Bolt) Adjustable angle: 0°~ 90°.Maximum height extension 150mm.Help to make your bike very comfortable to ride. Weight:398g. Constructed of high-strength CNC machined 6061 T6 aluminum alloy. Strong and durable. Suitable for Most of Mountain bike Road bike MTB BMX etc. Please measure your handlebar diameter before you buy this adjustable stem. Easy to install: 1.Loosen the bottom screws use a wrench;2. Take out the black button; 3.Loosen the left and right screws use a wrench;4. You need to take out the black buttom first when you adjust the angles.]