Features: Please confirm that your handlebar is 31.8mm (1.25 inch) before purchasing. Degree: 0-120° adjustable. Not applicable to giant bikes. The mountain bike stem is made of high-strength aluminum alloy. Lightweight and durable MTB stem. Use the adjustable stem to achieve a more comfortable riding position, the pain caused by the adjustment in the shouldersarmsback must be corrected. This stem and a riser handlebar did the trick, allowing you to sit more upright on the bike which is better for your back. Easy to install, just connect the front fork stem. Four bolt clamps hold the bar securely in place. Adjustable handlebar stem suitable for most road bikes, mountain bikes, downhill bikes, track bikes, fixie bikes, MTB-BMX Specifications: Material: Aluminum alloy Front fork: 28.6mm18 For handlebar diameter: 31.8mm14' Length: 100mm3.94inch Note: Please allow 1-2cm error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1pc Mountain Bike Handlebar Riser Extender