License Plate Cover Smoke Gray Dome. Here is a really nice license plate cover for your favorite ride. This is a really nice, quality item! It is Unbreakable UV Polycarbonate! It measures about 12" X 6" OD. The manufacturer guarantees it to be unbreakable! We wonder if it will block the red light cameras we have in the metro here? I am going to put 2 on my car. How will I know if it works though? The listing is for 1 cover as shown.