CIPA 8 Inch x 10 Inch Wide Angle Lens enables you to see an enlarged view not available through your inside rearview mirror or side mirror. It dramatically increases visibility and confidence when parallel parking or backing up. The Wide Angle Lens is flexible and easy to attach. It easily applies to the inside of your rear window to eliminate rearview blind spots and increase viewing. Thin polyvinyl construction clings to your window without using glue adhesive. The Wide Angle Lens will not turn yellow or damage your glass. It becomes crystal clear 24 hours after application, and will stay on until peeled off. It can be cleaned using mild detergent and water. The Wide Angle Lens can be used for other applications as well. For example, a lower view can be achieved by applying the Wide Angle Lens to the inside of an office window in a high building. They can also be cut by scissors into smaller pieces for small window applications.