Never Forgotten 9/11/01 - 6" x 6-1/2" - Vinyl Die Cut Decal/ Bumper Sticker For Windows, Cars, Trucks, Laptops, Etc. This is a vinyl, die cut decal....WAY better than a bumper sticker. The material used is made to last 6 years on the outside of your vehicle but can be applied to most clean smooth surfaces. This product applies to your car similar to how you apply a temporary tattoo.... ...dont worry, we provide indepth application instructions. The transfer tape that we use on our products is clear, which makes for easy application