We'll send you a sheet of blank magnetic material that is brownish black on the non-magnetic side. This is the same strong but flexible material used for bumper magnets. Material is .020" thick and a brownish black on the non-colored side. Material can be trimmed with a pair of scissors, or better yet, a paper cutter. Great for crafts projects. Also available in several other sizes. Search our store using the Lifeweaver_llc link above.