1. rotation adjustable mini rear view mirror, suitable for Mountain Road Bike / Cycling Bicycle / / ES1 /ES2 Electric Scooter. 2. Mirror diameter: about 8mm. One mirror only 0.02kg weight, will not the bike, lightweight and durable. 3. rotation help you watch any direction of your back. 4. With adjustable silicone rubber belt, suit for different bar's size (0.6-1.4inch), easy to install, even can be directly mounted on the handlebar without tools. Colour: black Material: acrylic + plastic Size: Mirror diameter: 8cm Package Contents: 2 * Rear View Mirror Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.