Durable Material: The bicycle rearview mirror is made of high-quality ABS, the convex mirror has a wide field of view, and the sturdy structure ensures the life of the mirror. Convex Mirror8 cm in diameter, smooth surface, no glare, providing you with a clearer view, the mountain bike rearview mirror has a convex mirror with a wide field of view, which can be adjusted to any viewing angle. Easy to Install: Equipped with the required screws and non-slip washers to adjust the washers, you can attach the lens to the frame to increase friction to fix it firmly in place, very easy to install on any mounted handlebar without any tools. Rotatable and Adjustable: This bicycle rearview mirror adopts a rotatable design. 360-degree rotation, can be adjusted to any direction, help you observe all directions of your back, ensure safe riding. Wide Application: Suitable for handlebars with an inner diameter of 20 mm to 30 mm. It fits on both sides of the handlebar and is perfect for most bicycles, such as road bikes, mountain bikes, e-bikes, hybrid bikes, city bikes, motorcycles, e-bikes, e-scooters, etc.