Our Domed decals are a thick rubberlike decal, approx. 1/8 inch thick. Domed Decals may be used both, indoors or outdoors. All of our Domed Decals have an easy install paint safe adhesive foam tape backing. All designs are sold in Mirrored PAIRS (one for the left side and one for the right side of your vehicle). Use them on Cars, Trucks, Boats, Scooters, Motorcycles, Walls, Windows, Doors, Laptops, Toolboxes, Mailboxes, or any flat smooth hard surface.