Please Watch Our Second Installation Photo , It's Very Important For Installation and Select!! Some models require the purchase of additional adapters, please check our detailed description. Note : Please kindly try your best to tighten three strews(even though the screw exceed two threads), then the mirror stem will stay in the right way and never moved during riding but only adjust the mirrors to the best angles If you have any issue on the installation or other issues on the mirrors, please do not hesitate to contact us.Tips: Use blue threadlocker to keep the product away from vibration or loose. White Lens,Clarity Is Great , The Mirror Provides You A Wide View Behind You,Sturdy Construction - CNC Machined Aluminum Alloy Body With Durable Black Coating, Built For Long Lasting Package: 1 pair lenses mirror(Left & Right). Lens curvature: R1200 Lenses have anti-glare function