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Magnetic Iron Powder Filings For Magnet Education And School Projects, 2 St Model:BMB97671 It Fits The Humid Environment2 Storages Jar Containing 24 Oz Iron Filings With Shaker Lids. Suitable For Children Over 8 Years Old. Explore The Basic Concepts Of Magnetic Fields, Including Poles And Attraction. Using These Iron Filings, A Magnet , And A Sheet Of Paper, You Can View Patterns Of Force Created By A Magnetic Field. Used For Magnet Education And School Projects To Show Your Students And Kids The Magetic Lines. Our Iron Powder Will Be A Good Assistant For You To Know