Description
Grade 5 and up. World’s most powerful permanent magnet, many times the strength of ordinary or other rare-earth magnets. Made of 25% neodymium, 70% iron, and 5% boron. Round. Size, 1/2 x 1/4″. Includes instruction sheet with suggested experiments.
WARNING: Neodymium magnets have a very strong magnetic field. Use with caution. Seek immediate medical attention if magnet is swallowed.