Features: This rearview mirror can mounted on the handlebars. Suitable for handlebars Inner hole with a diameter of 16.8-20mm/0.66-0.79inch. Using light weight acrylic lens, provide clearly view and eliminate blind spots to ensure driving safety. This bicycles rear view mirror have a 360 rotating base that provide a wide field of view and flexible adjustment space. The stand only needs to attach with expansion screws. Once mirror is installed, it not wobble or breaks even during downhills trail. Suitable for most Bicycles handlebars, enduring and easy to installation. This product can provide a good rear view and help ride safely. Specifications: Component: acrylic Style: Left Size: about 21x8cm/8.27x3.15inch Package Includes: 1Pc Rearview Mirror 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.