Alnico magnets are made up of aluminum, nickel and cobalt. They are very strong and are ideal for a variety of science experiments. These 3 inch alnico bar magnets are perfect for demonstrating the magnetic lines of force. Simply cover the magnet with a piece of paper, then sprinkle iron filings over the top and watch them form into the lines of force. Packaged to slip into any Christmas stocking or gift basket, this set will definitely benefit any teacher needing a simple science lesson on the power of magnets!
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