Super Strong Neodymium Disc Magnets with Double-sided Adhesive, Powerful Permanent Rare Earth Magnets. Fridge, DIY, Building, Scientific, Craft, and Office Magnets, 1.26 inch D x 1/8 inch H - 12 Packs: Amazon.com:
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Super Strong N52 Neodymium Magnet 3 x 1/2 x 1/8" Bar, The World's Strongest & Most Powerful Rare Earth Magnets by Applied Magnets: Amazon.com: Industrial & Scientific