Driving safety guarantee - the bicycle mirror provides the best all-round vision and improves driving safety. EASY TO INSTALL - The bottom of the mirror is an elastic strap made of silicone rubber which s 'inserts into the handle, just snap it on with the rubber band, no tools required. Flexible adjustment - the mirror base can be rotated 360 degrees and the mirror can be rotated 180 degrees . APPLICABILITY - This bicycle mirror fits handlebars from 15mm to 35mm in diameter, ideal for city bikes, motorcycles, e-bikes, BMX, mountain bikes and racing . Diameter: 8cm Packing List: 2 mirrors. We only sell mirrors, not other items in the picture. Due to the difference between different monitors, the pictures may not reflect the color actual item. Due to manual measurement, please allow slight errors in size.