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✨ Elevate your rock polishing game with pro-grade grit ⚙️
MJR Tumblers 400/600 Grit Aluminum Oxide is a premium stage 3 pre-polish grit designed to refine and smooth stones, glass, and minerals. Compatible with rotary and vibratory tumblers, this 20lb pack ensures consistent abrasion and prepares surfaces perfectly for final polishing. Proudly made by a USA-based veteran-owned brand, it’s trusted for reliable, professional lapidary results.







| ASIN | B0CP8VPZXZ |
| Best Sellers Rank | #21,778 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #37 in Tumbling Media |
| Brand Name | MJR Tumblers |
| Compatible Material | Premium Quality Aluminum Oxide |
| Customer Reviews | 4.4 4.4 out of 5 stars (20) |
| Grit Material Type | Premium Quality Aluminum Oxide |
| Grit Number | 600 |
| Grit Type | Super Fine |
| Included Components | Instructions and Grit |
| Manufacturer | MJR Tumblers |
| Material Type | Premium Quality Aluminum Oxide |
| Number of Items | 1 |
| Part Number | MJR20p400/600AO |
| Unit Count | 1 Count |
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