---
product_id: 407853171
title: "MJR Tumblers Refill Grit Kit for 3 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish"
brand: "mjr tumblers"
price: "R$573"
currency: BRL
in_stock: true
url: https://www.desertcart.com.br/products/407853171-mjr-tumblers-refill-grit-kit-for-3-lb-rock-tumblers
store_origin: BR
region: Brazil
---

# 12,000 grit sub-micron polish 4-step precision grit system Proudly USA made, veteran owned MJR Tumblers Refill Grit Kit for 3 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish

**Brand:** mjr tumblers
**Price:** R$573
**Availability:** ✅ In Stock

## Summary

> ✨ Elevate your rock tumbling game with pro-grade grit & polish! ⚙️

## Quick Answers

- **What is this?** MJR Tumblers Refill Grit Kit for 3 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish by mjr tumblers
- **How much does it cost?** R$573 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/407853171-mjr-tumblers-refill-grit-kit-for-3-lb-rock-tumblers)

## Best For

- mjr tumblers enthusiasts

## Why This Product

- Trusted mjr tumblers brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Ready to Use:** Lightweight, easy-to-store kit designed for seamless refills and hassle-free tumbling.
- • **Optimized for 3 LB Tumblers:** Perfectly portioned for consistent, professional-grade rock tumbling results every time.
- • **Unmatched 12,000 Grit Polish:** Achieve mirror-like shine with premium sub-micron aluminum oxide polish.
- • **Veteran & Disabled Owned Quality:** Support a USA-based company committed to excellence and community.
- • **Precision Multi-Stage Grit System:** From coarse to ultra-fine, 4-step silicon carbide & aluminum oxide grit for flawless polishing.

## Overview

The MJR Tumblers Refill Grit Kit offers a meticulously calibrated 4-step silicon carbide and aluminum oxide polishing system, including a premium 12,000 grit sub-micron polish. Designed specifically for 3 lb rock tumblers, this USA-made, veteran-owned kit ensures consistent, high-quality results for hobbyists and professionals alike.

## Description

MJR Tumblers Refill Grit Kit for 3 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish

## Features

- 3 ounces of 60/90 Graded Silicon Carbide Grit (Step 1)
- 3 ounces of 120/220 Graded Silicon Carbide Grit (Step 2)
- 1.5 ounces of 500/600 Graded Silicon Carbide Grit (Step 3)
- 1.5 ounces of 1200 Aluminum Oxide Polish (Step 4)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Aluminum Oxide Silicon Carbide Plastic Pellets |
| Grit Material | Aluminum Oxide,Silicon Carbide |
| Item dimensions L x W x H | 20.3 x 15.2 x 1 Centimeters |
| Brand | MJR Tumblers |
| Grit Type | Medium |
| Item Weight | 0.56 Pounds |
| Grit Number | 12000 |
| Number of Items | 4 |
| Manufacturer | MJR Tumblers |
| Model Number | MJR3pgk |
| Batteries Required | No |
| Batteries Included | No |
| Material Type(s) | Aluminum Oxide Silicon Carbide Plastic Pellets |
| Colour | Green |
| Product Dimensions | 20.32 x 15.24 x 1.02 cm; 254.01 g |
| Item model number | MJR3pgk |
| Manufacturer recommended age | 8 months and up |
| Item Weight | 254 g |

## Product Details

- **Material:** Aluminum Oxide Silicon Carbide Plastic Pellets
- **Grit Material:** Aluminum Oxide,Silicon Carbide
- **Item dimensions L x W x H:** 20.3 x 15.2 x 1 Centimeters
- **Brand:** MJR Tumblers
- **Grit Type:** Medium

## Images

![MJR Tumblers Refill Grit Kit for 3 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish - Image 1](https://m.media-amazon.com/images/I/61aeQRPy1vL.jpg)

## Questions & Answers

**Q: Can you use this for a 1 lb National Geographic tumbler**
A: It should work just fine. This is just the grit and the grit is usable in any tumbler.

**Q: Can this grit be used for grinding and polishing rock thin sections?**
A: i would think so

**Q: After the polish, are the rocks glossy and shiny?**
A: They won't be as shiny as you think.  The grit polish the rocks so try are smooth but there is a fifth stage in rock polishing called burnishing that you have to do at the end.  Search the internet on directions but it involves tumbling them in soap like borax. Also, if you want your rocks to look good you have to get the ceramic filler pellets to even out the tumbles.  Plastic doesn't do the trick like ceramic.  Filler pellets vs no filler pellets is a big difference on helping the rocks get shiny.

## Frequently Bought Together

- Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Results. For 3lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned
- UU UNIHOM 3 lbs Bulk Rough Madagascar Stones Mix Large 1" Natural Raw Stones Crystal for Tumbling, Cabbing, Fountain Rocks, Decoration,Polishing, Wire Wrapping, Wicca Reiki Crystal Healing
- FORBY 3 lbs Bulk Rough Madagascar Stones Mix - Large 1" Natural Raw Stones Crystal for Tumbling, Cabbing, Fountain Rocks, Decoration,Polishing, Wire Wrapping, Wicca & Reiki Crystal Healing

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**Shop now:** [https://www.desertcart.com.br/products/407853171-mjr-tumblers-refill-grit-kit-for-3-lb-rock-tumblers](https://www.desertcart.com.br/products/407853171-mjr-tumblers-refill-grit-kit-for-3-lb-rock-tumblers)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-01*