Features136mm diameter mirrors with fine polished finish for larger and clearer reflection. 2Mirror supports 360 Degreerotation, easily adjusted to suit a variety of riding situations. 3High-quality acrylic mirror and silicone sleeve tube, with nice durability, strong and not easy to age. 4Easy to install to the bike handlebars, fixed with screws, firm and not easy to fall off. 5Compact size, light and portable, easy to put into backpacks or pockets.SpecificationBicycle handlebar mirror is designed to provide cyclists with a clear and wide-angle view of the surroundings, and make riding safer. The mirror is 36mm in diameter, with a fine polished finish to provide a larger and clearer reflection. Support 360 Degree rotation, can be applied to a variety of riding situations. Simple and easy to install, screwed in place, stable and safety. It is for use on road or mountain bikes.Features:36mm diameter mirrors with fine polished finish for larger and clearer reflection.Mirror supports 360 Degreerotation, easily adjusted to suit a variety of riding situations.High-quality acrylic mirror and silicone sleeve tube, with nice durability, strong and not easy to age.Easy to install to the bike handlebars, fixed with screws, firm and not easy to fall off.Compact size, light and portable, easy to put into backpacks or pockets.Specifications:Color: BlackMaterial: Acrylic & SiliconeCaliber: 28-32mm / 32-36mm(optional)Item Size: 28-32mm: 32 * 32 * 49mm/ 1.3 * 1.3 * 1.9in 32-36mm: 36 * 36 * 49mm/ 1.4 * 1.4 * 1.9inItem Weight: 25g/ 0.9ozPackage Size: 47 * 38 * 52mm/ 1.9 * 1.5 * 2.0inPackage Weight: 35g/ 1.2ozPacking List:1 * Rearview MirrorPackage List1 * Rearview Mirror