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10Pc Super Strong Neodymium Magnet 1.26" x 1/8" NdFeB Discs W/ Red dot to indicate North Pole, the World's Strongest & Most Powerful Rare Earth Magnets by Applied Magnets: Amazon.com: Industrial &
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
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
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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