This bicycle rear view mirror is easy to install and it will make your riding safer the morror can be closed so it won't increase the resistance of riding.Features:This rear view mirror can be mounted on the handlebars.It can be rotated 360 degrees and you can see the distance of 20-40m behind.Reduce air resistance and reduce interference with the rider.Suit for 21-22mm handlebar bicycle.Specifications:Main color: blackMain material: PC acrylicItem weight: 16g / 0.6ouncePackage size: 111 * 72 * 61mm / 4.4 * 2.8 * 2.4inPackage weight: 43g / 1.5ouncePackage list:1 * Bicycle Mirror
