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Amazon.com: 1/2/3/5PCS 20x30mm Neodymium Magnet 20mm x 30mm NdFeB Round Super Powerful Strong Permanent Magnetic imanes Disc 20 * 30mm (Color : 5PCS, Size : 20x30mm) : Industrial & Scientific
Amazon.com: TEKNIS 5/10/20/50Pcs 20x10x2 Neodymium Magnet 20mm x 10mm x 2 NdFeB Block Super Powerful Strong Permanent Magnetic imanes Block (Color : 20x10x2(20Pcs)) : Industrial & Scientific
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Amazon.com: Tohoer Magnetic Hooks, Heavy Duty Neodymium Magnet Hook 30LBS with Rust Proof for Indoor Outdoor Hanging,Refrigerator,Grill,Kitchen,Key Holder,Black,Pack of 8 (20MM) : Industrial & Scientific