Features: Convex Mirror: Mountain bike mirror feature the convex mirror with its wide field of view and is adjustable to any viewing angle. Multi-Function: 360 horizontal rotation, 90 degrees counterclockwise or clockwise rotation help you watch every direction of your back. It can be rotated depending on your needs. Materials: The color is black, the material is silicone, mirror dia: about 5.3cm/2.09inch, 7.9cm/3.11inch. Easy To Install: It is easy to install and remove with adjustable rubber belt. No need for any tools. Just snap on mounting with rubber strap. Well mounted in minutes. Wide Applications: Glass mirror and silicone rubber belt support a clear view and fastness. Applies to mountain bikes, off-road vehicle and fixed gear bikes. Specifications: Type: Bike Rearview Mirror Material: Silicone, Glass Color: Black Mirror Dia: About 5.3cm/2.09inch, 7.9cm/3.11inch Application: For handlebars with diameter of about 15-35mm Package Included: 2pcs x Bike Rearview Mirror Welcome to our store , hope you have a pleasant shopping experience