Thin and flexible magnetic material is great for magnetizing bumper stickers, etc. We'll send you a sheet of blank magnetic material that is brownish black on both sides. This is the same strong but flexible material used for bumper magnets and fridge magnets. Material is .030 in. thick. Material can be trimmed with a pair of scissors, or better yet, a paper cutter. Great for other crafts. Search our store using the Lifeweaver_LLC link above.