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Amazon.com: Tonmp 3 LBS Rock Tumbler Grit Set, Rock Tumbler Grit Polish Refill - 4 Basic Step Tumbling Media Works with Any Rock Tumbler, Rock Polisher, Stone Polisher : Toys & Games
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Amazon.com: NATIONAL GEOGRAPHIC Rock Tumbler Media – Rock Polisher Tumbler Kit, 4 Stage Tumbling Grit and Polish, Ceramic Pellets, GemFoam Polishing Foam, 3 lbs Madagascar Rocks, Great for All Rock Polishers :
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National Geographic Grit Refill for Rock Tumbler — Brainfuel Toys | Educational STEM Toys for Kids, Parents, & Teachers
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