1. Universal design: The bicycle mirror at the end of the handlebar can be mounted on the left and right sides of the flat handlebar or drop handlebar. Fits handlebars in the range of 17,4 mm 22 mm (inner diameter). Ideal for road bikes, mountain bikes, city bikes, electric bikes, etc. 2. Convex mirror: The bicycle rearview mirror Made of the highest quality and durable materials, this convex mirror (diameter 76 mm) provides a large field of view and a stable image. The compact design makes it shockproof, while the folding design allows you to fold it up when encountering an obstacle. 3. 360 degree rotation: The base with full 360 degree rotation and the ability to adjust in any direction to help you observe your back in any direction and provides a clear view to ensure safe driving. 4. Durable and durable: Bike mirrors for handlebar surfaces made of ABS lens case, acrylic lens and PC bracket with high hardness. Compared with traditional glass mirror surface, it has a longer service life and is safer. 5. Easy to install: The 2 pieces of bike rearview mirror come with a protective film. It should be removed before use. For installation, use a hex key to attach the screw to your bike handlebar, then tighten it to ensure a secure closure. General-purpose bicycle convex rearview mirror Easy installation & Won't bumps It is suitable for bicycle handlebars with inner diameter of 17.4mm -22mm, easy to install and anti-skid, enhancing stability. Perfect for Most of the Bikes! Ideal for road bikes, mountain bikes, E-bikes, hybrid bikes, city bikes, and YOUR BIKE ! Prepare for your journey! When you ride a bicycle without knowing what is happening around you, your life is in danger! Use our LWPITTY bike mirror to stay safe. The high-definition convex lens can provide you with a wide-angle field of view. Ensure safe driving in various traffic conditions. HD bicycle rearview mirror . Specification: Material: ABS plastic and acrylic lens Black color Mirror diameter: 7 cm Suitable base size: 17,4-22 mm Package includes: 2 x Bicycle Mirrors 2x keys