Heavy Duty Structure – Crafted from CNC Billet Aluminum with Vibration Resistant Housing.It is very shockproof and corrosion resistant, great for all weather conditions!You can touch and feel the quality material once you’ve got the bar end mirrors. Much more sturdy and fashion.3.86″x1.93″ mirror surface.mirror glass for an extended field of vision. Fitment – Universal handlebar mirrors fits inside handlebars with 13 to 18mm inside diameters.(for reference only) ALL 7/8″ handlebar.Please check the handlebars inside diameters. Wide And Clear View – 360??Rotates and adjusts for better visibility!Blue glare-reduction mirror lenses of motorcycle bar end mirror, help you easily seeing the upcoming cars and motorcycles. Widen your vision and keep your driving safety. Easy Installation: Three different thickness of black plastic sleeves to meet your purposes. Please kindly try your best to tighten strews, then the mirror stem will stay in the right way and never moved during riding t only adju