Ride smart and more safely with Serfas MR-3 Bar End Mirror to help increase awareness and visibility of your surroundings as you ride. Features: Blast-Resistant Glass Reflective Lens 360 Degree Adjustable Viewing Angle Mounts 21-26mm Diameter Bars (5mm Hex Wrench Required For Install) Eco-Friendly High Impact Nylon Fiber Body Specs: Mounts 21mm-26mm Diameter Handlebars Lens: Blast-Resistant Glass Color: Black Weight: 119 Grams (Per Side) / 238 Grams (Combined Left and Right) Quantity: (1) Mirror - Left or Right (Left/Right Sides Sold Individually) Installation Notes: 5mm Hex Wrench Required