Nice to MeetYou Hello my friend, Thanks for your visit! Our store aims to sell productof the highest quality butat the lowest price. We try to put everyefforttoevery requestfrom you. We try to ship out everyproduct withinevery day. We try to become friends with you. Product DescriptionFeature: Size(L*W):200*250mm/(6*7.5) Material::Plastic Focal Length:-330mm/(-9.9) Thickness:2mm/(0.06) Function: Increase the visual Angle of astern Increase Viewing area Increase the driving safety Note: Only suitable for vertical rear glass hatchback Does not apply to the rear glass ramp too hard for the car How to install? 1.Installed in the window below effect is better. 2.Make sure the installation position of the glass surface is clean,then wet it with water. 3.The product smooth surface paste on glass wet area. 4.With a soft towel remove paste surface bubbles . 5.Paste surface after drying can be adsorbed on its own and can not fall off. Package Included:1*wide angle fresnel lens Product Show Our Strength We have all kinds of products. If you need other products,just add to chart and then visit our store to choose more. We can ship them together to you! We promise: If our product is of bad quality,100% money