Ride Smart And More Safely With SerfasA(C) Bar End Mirrors To Help Increase Awareness And Visibility Of Your Surroundings As You Ride. Features: High-Definition, Blast Resistant, Anti-Glare Glass Lens Base: Eco-Friendly High Impact Nylon Fiber Universal Design For Left & Right Rotates 360 Degrees Specs: Fits Handlebars With 16mm-22mm Diameter Bar Ends Color: Black Installation Torque Spec: 1 lb/ft (12 kg/cm) using 5mm Hex wrench