This mirror is designed for wearing on arm, don't need to place on the bike. Perfect quality and weather-resistant. You can have a try.Features:It is designed for wearing on arm, wristband is made of high-quality breathable cloth and elastic material.It's lightweight and compact supports rotation in 360 degrees, so you don't have to turn your heads while riding and it will make you feel more secured in outdoor cycling.Wide view convex mirror provides a wider view. Rearview mirror can adjust angle freely to view the car in the back, increae the saftyConvex type mirror, diameter 36mm, crystal clear view.Easy to open, but tightly closed.Specifications:Color: blackMaterial: plasticFor people: for both men and womenSize: one size fits allItem size: 63 * 51mm / 2.5 * 2.0inMirror diameter: 36mm / 1.4inPackage size: 108 * 70 * 35mm / 4.2 * 2.8 * 1.4inPackage weight: 37.1g / 1.3ouncePacking List:1 * Arm Mirror