Feature●The arm is made by stainless steel, durable and more sturdy which diameter 8mm.●PE shell by Electroplating process, Vintage style with beautiful shape, environmental protection without any smell.●Convex clear glass, 100mm big size, you can get high clear big rear view.●Compatible with most popular Handlebar, Such as Mountain Bike Road Bike Bicycle Electric Bike ebike Motorcycle Scooter which diameter is 20-25mm.●Come with Bolt 8mm, Easy to install and adjustable.Description