These 20 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 sprinkler jar with a removable perforated lid and screw cap for easy cleanup after experiments. Quantity: 454g (1 lb).

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