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Amazon.com: MJR Tumblers Single Barrel Rock Tumbler with Grit Media Kit - Polishing Tool for Adults and Kids Rock Polisher Machine with Grit & Plastic Pellets for Polishing Stones, 40 lb :
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Amazon.com: MJR Tumblers Single Barrel Rock Tumbler - Rock Polisher Machine, Tumbling Equipment for Stone, Glass, and Metal Collection, Polishing Tool for Adults & Kids, 15 lb : Toys & Games
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