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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 for rotary and vibratory rock tumblers. This super fine abrasive smooths and refines stones, glass, and minerals, preparing them perfectly for final polishing. Made in the USA by a veteran-owned brand, it guarantees consistent, high-quality results for serious hobbyists and professionals alike.







| ASIN | B0CP8WFYXV |
| Best Sellers Rank | #17,411 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #36 in Tumbling Media |
| Brand Name | MJR Tumblers |
| Compatible Material | Premium Quality Aluminum Oxide |
| Customer Reviews | 4.3 4.3 out of 5 stars (18) |
| 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 | MJR1p400/600AO |
| Unit Count | 1.0 Count |
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