We'll send you a sheet of blank magnetic material that is brownish black on the non-magnetic side. This strong but flexible material is sometimes used for bumper magnets. Material is .030" thick, making it slightly thicker than our standard (.020) material. Use this material for a stronger hold to steel surfaces. This thicker material is better suited to holding papers and photos to your refrigerator or file cabinet. Brownish black on both sides. Material can be trimmed with a pair of scissors, or better yet, a paper cutter. Great for other crafts. Also available in several other sizes. Search our store using the Lifeweaver_llc link above.