INSTALL NOTICE – They are aftermarket 7/8 bar end mirrors, not OEM motorcycle mirrors, only can install in standard hollow handlebar, if handlebar is threaded may need to be modified or can’t install, please check the install picture. If the product install or quality problem need help please contact us. WIDE FITMENT – 7/8 inch Inner 13-19mm Standard Hollow handlebar Motorcycle Cruiser Sport Street Dirt Bike Scooter, some models need to modified can install. HIGH QUALITY COMPONENTS – Bar End Mirrors used CNC Billet Aluminum Housing & Optical Grade Acrylic with Anti Glare Mirror CLEAR VISION – Give a high definition and wider angle vision on both Day and Night, easily seeing the upcoming cars and obstacles. BEST VISION POSTION – Set the Left Mirror to see What is Behind you and Set the Other Mirror for What is in your Rear-Three-Quarters Vision