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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
Dowling Ceramic Magnets Classroom Pack - Ring - Size 1-1/8 in. (28 mm) Diameter | Magnetism | Physical Science | Science | Education Supplies | Nasco
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