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Super Strong N52 Neodymium Magnet 4 x 1/2 x 1/4" Bar, The World's Strongest & Most Powerful Rare Earth Magnets by Applied Magnets: Amazon.com: Industrial & Scientific
Super Strong Neodymium Disc Magnets, Powerful N52 Rare Earth Magnets for Fridge, DIY, Building, Scientific, Craft, Office Magnets- 1.26 inch x 1/8 inch (12): Amazon.com: Industrial & Scientific
40x40x20mm Super Strong Neodymium Block Magnet, N52 Permanent Magnet Disc, The World's Strongest and Most Powerful Rare Earth Magnets - One Piece: Amazon.com: Industrial & Scientific
Amazon.com: Cfbjfq 1pcs Strong Round Dia 50mm x 30mm N52 N40 N35 Rare Earth Neodymium Magnet Art Craft Fridge 50x30mm (Color : N52 40x20) : Industrial & Scientific