These 40-60 mesh magnetic Iron Filings are great for classroom use and allow students to engage in a wide variety of hands-on experiments to develop a greater understanding of concepts related to magnetism. Further student explorations are readily accomplished by using a variety of magnet types, numbers, locations, polarities, and shapes. It comes in a convenient plastic jar with screw cap. Quantity: 250g.

NOTE: Not suitable for children under 8 years of age. Wash hands after use.