Features 1、Convex Mirror: The bike mirror adopts convex mirror design to provide a wider field of vision, clearly see the road conditions behind, and avoid accidents. 2、360 ° Rotation: The rearview mirror supports 360 degree rotation adjustment, and can adjust the direction as needed to help you observe back. 3、Applicable Size: The bike rearview mirror is applicable to a flat bar with an inner diameter of 0.71‑0.86in (18‑22mm), and has a wide range of applications. 4、Wide Application: Including a pair of rearview mirrors, which can be installed on electric bikes, city bikes, mountain bikes, convenient and practical. 5、Durable Materials: The rearview mirror is made of excellent plastic and resin materials, with good toughness, wear resistance and corrosion resistance. Item Type: Bike Rearview Mirror Material: Plastic, Resin Applicable Bar Inner Diameter: Approx. 18-22mm / 0.71-0.86in Size: Approx. 11.5 x 13cm / 4.5 x 5.1in Mirror Diameter: Approx. 7cm / 2.8in Package List 2 x Rearview Mirrors 2 x Hex Wrenches