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Amazon.com: Ceramic Ring Magnets, 1.75" Outer Diameter, 0.865" Inner Diameter, 0.225" Thick (Pack of 2) : Industrial & Scientific
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Amazon.com: X-Bet Magnet Ceramic Magnets - Round Disc - Flat Circle Magnets Bulk for Crafts, Science & Hobbies - Perfect for Refrigerator, Whiteboard, Fridge : Industrial & Scientific
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