About this item Plastic convex mirror:The mountain bike mirror adopts a convex mirror, which has a wide field of view and can be adjusted to any angle of view.Flexible angle: The joints are flexible, allowing multiple angle adjustments according to your needs. The base can be fully rotated 360 degrees and can be adjusted to any direction to help you observe all directions of your back. The rearview mirror can be adjusted 180 degrees to get a better view of traffic and ensure your riding safety.High quality: The use of high-strength plastic frames and resin mirrors is strong, shock-resistant and durable.Easy to install: It adopts adjustable rubber buckle design, suitable for handlebars with a diameter of 15MM-35MM. No tools are required. Just use the rubber strap buckle to install it.Compatible with bicycle mirrors: The adjustable bracket is suitable for round tube handlebars of different sizes. Very suitable for left or right handles. Specification Material: plastic+glass+resinSuitable for handlebars: 15-35mmMirror diameter: about 3.0 inchesWeight: about 50 grams eachPacking list: 1 * bicycle rearview mirror or 2* bicycle rearview mirror