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







| ASIN | B0CP8WRHLJ |
| Best Sellers Rank | #25,875 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #41 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 | 400/600 |
| Included Components | Instructions and Grit |
| Item Weight | 3 pounds |
| Manufacturer | MJR Tumblers |
| Material Type | Premium Quality Aluminum Oxide |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | MJR3p400/600AO |
| Unit Count | 1 Count |
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