Generic 3-inch Round Convex Rearview Mirror 360 Degree Adjustable Wide-angle Lens Handlebar Reflector for Outdoor Cycling Bicycle Bike MTB.etc Wide view angle, well protect your safety in cycling bicycle mirror Material: Durable ABS Plastic Mirror Size: D 3" (7.5cm); Stem Lenght: 5.3" (6cm + 7.5cm) Attaches to either left-side or right-side available 360 degree adjustable, Fits outside handlebars less than 22 mm diameter