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🪨 Elevate your rock polish game—because your stones deserve the pro touch!
MJR Tumblers 400/600 Grit Aluminum Oxide is a premium stage 3 pre-polish grit designed for rotary and vibratory rock tumblers. This 5lb pack of super fine aluminum oxide grit smooths and refines stone surfaces, reducing scratches and preparing them for final polishing. Ideal for rocks, minerals, and glass, it offers consistent abrasion and is produced by a trusted USA veteran-owned brand.







| ASIN | B0CP8WG7SW |
| Best Sellers Rank | #23,287 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #42 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 |
| Item Weight | 5 pounds |
| Manufacturer | MJR Tumblers |
| Material Type | Premium Quality Aluminum Oxide |
| Number of Items | 1 |
| Part Number | MJR5p400/600AO |
| Unit Count | 1 Count |
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