Features: Make of aluminum alloys materials, strong and enduring, rustproof, prevent fading. Easy to install, stable and firm, not easy to loosens. When used, the screen information is not obstructed, making cycling operations more convenient. Simply mount the mounting wreath on frame and screws it until it is fully clamped. Then adjust the angles at which bracket is to attach, depending on how you want it. Suitable for phones between 3-6.8inch, which applicable to most mobile phone size. Suitable for pipe diameters of 21-31.8mm/0.83-1.25inch, which suitable for most bicycles and some electric bicycles and motorcycles. Suitable for outdoor cycling, cycling, travel, you can attach your phone to your bike for easily map navigations or answering phone calls. Specifications: Materials: Aluminum Alloys Color: Black/Redness/Metal Color Adjustable ranges: 55-100.0mm/2.17-3.94inch Package Includes: 1pc Bike Phone Holder 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.