Features: Make from carbon fibers Plastic, ligth weight, high strength and solid. Easy to install and use, just connecting up before front fork stem. The ergonomic design lowers the position of the handle and increases the stability of the control. Suitable for mountain bike, fixed gear , road bike and more. The bicycles stem is simple to install on your bike, allowing you to quickly and easily upgrades your bike's handlebar. Specifications: Component: carbon fibers Plastic Type: 70mm/80mm/90mm/100mm/110mm Size: about 8.3x12x4.5cm/3.27x4.72x1.77inch Fork Clamp Diameter: 28.6mm Handlebar Diameter: 31.8mm Stem angles: 6 degrees Package Includes: 1pc Bicycles Stem note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.