Increase awareness and visibility of your surroundings as you ride. Features: a Blast-Resistant Glass Reflective Lens a 360 Degree Adjustable Viewing Angle a Mounts 21-26mm Diameter Bars (5mm Hex Wrench Required For Install) a Eco-Friendly High Impact Nylon Fiber Body Specs: a Mounts 21mm-26mm Diameter Handlebars a Lens: Blast-Resistant Glass a Color: Black a Weight: 119 Grams (Per Side) / 238 Grams (Combined Left and Right) a Quantity: (1) Mirror - Left or Right (Left/Right Sides Sold Individually) a Installation Notes: 5mm Hex Wrench Required