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Ferrite Magnet Ring Outer Diameter 80mm 3" Large Grade C8 Ceramic Magnets For Diy Loud Speaker Sound Box Board Home Use 1pc - Magnetic Materials - AliExpress
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Amazon.com: AOMAG® Ferrite Magnet Ring OD60 x ID32 x 10mm 2.4" Large Grade C8 Ceramic Magnets (Pack of 2) : Industrial & Scientific
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