Design:Bar end bike mirror can be installed on the left and right sides of the flat handlebar or the drop handlebar. Fits inside handlebar within 17.4mm ~ 22mm(inside diameter). for road bike, mountain bike, city bike, E-bike,etc..Convex mirror:Bike rear view mirror Made with top-and materials, this convex mirror (Ø 76 mm) for large field of view and a stable image.The compact design makes it shockproof, and the foldable design makes it foldable when encountering obstacles..360 Degree Rotation:Base with 360 degrees full rotation and could adjust to any direction to help you watch every direction of your back and you a clear view to ensure riding..Rugged & :Bike mirrors for handlebars surface made of ABS Lens Case ,Acrylic Lens and High Hardness PC Bracket .Compared with the traditional glass mirror surface,it has a longer life and is r ..Easy to Install: Bicycle rear view mirror 2pack comes with protective film please remove it before use.For installation,Use a hex wrench to the screw to the bicycle handlebar, and then tighten it to ensure a closure. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.