This bicycle rear view mirror is easy to install and it will make your riding safer. Features: Integrated, reinforced nylon support, the mirror is not easy to break, safer and practical. This rear view mirror can be mounted on the handlebars. It can be rotated 360 degrees according to your need. Suit for 17.2-20mm handlebar bicycle. Easy to install and the mirror is clear to view behind. Specifications: Type: left side mirror, right side mirror, left and right side mirrors (optional) Main color: black Main material: nylon Item weight: 110g / 3.9ounce Package size: 1pcs: 205 * 145 * 25mm / 8.1 * 5.7 * 1.0in A pair: 224 * 167 * 50mm / 8.8 * 6.6 * 2.0in Package weight: 1pcs: 160g / 5.6ounce A pair: 312g / 11.0ounce Packing List: 1 * Left Side Bicycle Mirror 1 * Right Side Bicycle Mirror