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✨ Elevate your rock polish game—because your stones deserve the spotlight! ⚡
MJR Tumblers 400/600 Grit Aluminum Oxide Pre-Polish is a premium stage 3 lapidary grit designed for smooth, scratch-free stone surfaces. Compatible with rotary and vibratory tumblers, this 5lb pack delivers consistent, even abrasion on stones, glass, and minerals. Proudly USA veteran-owned, it ensures dependable quality for serious hobbyists and professionals alike.







| ASIN | B0CP8WG7SW |
| Best Sellers Rank | #38,461 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #50 in Tumbling Media |
| Brand | MJR Tumblers |
| Brand Name | MJR Tumblers |
| Compatible Material | Glass, Stone |
| Customer Reviews | 4.4 out of 5 stars 21 Reviews |
| Grit Material | Aluminum Oxide |
| Grit Material Type | Aluminum Oxide |
| Grit Number | 600 |
| Grit Type | Super Fine |
| Included Components | Instructions and Grit |
| Item Weight | 5 pounds |
| Manufacturer | MJR Tumblers |
| Material | Aluminum Oxide, Silicon Carbide |
| Material Type | Aluminum Oxide, Silicon Carbide |
| Number of Items | 1 |
| Part Number | MJR5p400/600AO |
| Unit Count | 1 Count |
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