








🪨 Elevate Your Rock Polishing Game—Don’t Just Tumble, Transform!
The MJR Tumblers Refill Grit Kit is a meticulously calibrated 4-step polishing system designed specifically for 20-pound rock tumblers. Featuring a superior blend of green and black silicon carbide grits and a high-grade aluminum oxide polish, this kit delivers efficient, professional-grade stone finishing. With included polishing instructions and compatibility with MJR’s full media range, it’s the go-to choice for hobbyists aiming for flawless, high-gloss results.







| ASIN | B07F6YBMZC |
| Are batteries included? | No |
| Battery type | No batteries required |
| Brand | MJR Tumblers |
| Colour | Grey |
| Customer Reviews | 4.5 4.5 out of 5 stars (36) |
| Date First Available | 13 September 2023 |
| Item Weight | 1 kg 700 g |
| Item part number | MJR20pgk |
| Manufacturer | MJR Tumblers |
| Net Quantity | 1 Count |
| Package Dimensions | 22.2 x 17.91 x 5.99 cm; 1.7 kg |
| Power Source | manual |
V**I
Went through all grits to polish stone in a tumbler, and ran the polish grit twice, with no polish result to any the stones. When I have used other grits, I have successfully brought the stones to a high gloss in the same tumbler.
Trustpilot
1 month ago
3 weeks ago