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Amazon.com: Darknight Small Magnets Disc 20 Pack, Round Refridgerator Magnet,Strong Neodymium Rare Earth Magnetic Blocks for Fridge DIY Handcraft Office : Everything Else
Is it possible to make a ring-shaped magnet with the North and South Poles as inner and outer surfaces respectively or vice-versa? If yes, then how? - Quora
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20pcs Disc Dia12x1.1mm N40 Rare Earth Permanent Strong Neodymium Magnet Two Poles Special Magnets Nickle Coated Neodymium - AliExpress
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