Set of 4 pieces of acrylic block, with iron filings suspended in fine oil. The block is made of high-quality acrylic that does not break even when dropped. Useful to demonstrate the magnetic field of the various types of magnets without the mess of normal iron filing.
(Note: Magnets are not included).
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Tags: iron filing, ferrite, magnets, magnetism, magnetic field, magnetic line of force, induction,