---
product_id: 77741311
title: "Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 12lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned"
brand: "mjr tumblers"
price: "€ 67.78"
currency: EUR
in_stock: true
reviews_count: 13
category: "Mjr Tumblers"
url: https://www.desertcart.sk/products/77741311-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish
store_origin: SK
region: Slovakia
---

# 12,000 grit sub-micron polish Premeasured 4-stage silicon carbide grit Proud Disabled & Veteran Owned USA brand Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 12lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned

**Brand:** mjr tumblers
**Price:** € 67.78
**Availability:** ✅ In Stock

## Summary

> 💎 Polish Like a Pro, Shine Like No Other!

## Quick Answers

- **What is this?** Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 12lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned by mjr tumblers
- **How much does it cost?** € 67.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/77741311-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish)

## 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

- • **Expert Guidance Included:** Detailed, heartfelt instructions with pro tips make mastering rock polishing simple and rewarding.
- • **Effortless Precision Stages:** Premeasured 4-stage silicon carbide grits ensure perfect progression—just pour and tumble, no guesswork needed.
- • **Unmatched Ultra-Fine Polish:** Experience the pinnacle of shine with exclusive 12,000 grit sub-micron aluminum oxide polish for flawless results.
- • **Veteran-Owned Quality Assurance:** Support a Disabled and Veteran Owned American company delivering premium craftsmanship from Pecatonica, Illinois.
- • **Complete 12lb Kit for Serious Tumbling:** Includes coarse, fine, pre-polish, and extreme polish grits tailored for 12lb rotary and vibratory tumblers.

## Overview

The MJR Tumblers Refill Grit Kit offers a premium 4-stage silicon carbide grit system topped with an exclusive 12,000 grit sub-micron aluminum oxide polish, engineered for 12lb rock tumblers. Designed and premeasured for ease of use, this Disabled and Veteran Owned American brand delivers unparalleled polishing results with expert instructions included.

## Description

Buy Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 12lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned: Rock Tumblers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: This is TRUE GRIT! - This is simply some of the best quality tumbler grit I have used. If you do the first three stages properly, then the 12,000 girt polish will be perfect. All in all this is good, works well in each stage, easy to use. the only thing that might make it better would be to package it in bottles instead of bags, but honestly, that's about it.
Review: Passion-fueled and high quality - This grit and polish set is exceptional. You can tell it was crafted by people who genuinely care — not just about rocks, but about the process and purpose. This company emanates expertise and enthusiasm, and that shows in the results. My rocks came out more beautiful than ever and I would prefer to buy only from these rock guys. The picture is of some rocks from my apartment landscaping after the process . The instructions are detailed but easy to follow. It’s not your typical instruction manual, rather a sincere document created by the seller from the heart (their tips and tricks included!). It’s really unique and special. I’ve been using a “gimmicky” tumbler set for my HS STEM program and at home with my kids. As a teacher, is a great tool for many lessons and even many subjects.

## Features

- Extreme Polish! Every rock tumbling kit from MJR Tumblers comes with our Exclusive 12,000 Grit Sub Micron Extreme Aluminum Oxide Polish! No other polish even comes close to our results. If you want the best, MJR Tumblers 12,000 Grit Aluminum Oxide Extreme Polish is what you need!
- MJR Tumblers is a Disabled and Veteran Owned Company!
- Premeasured and works with all rotary and vibratory tumblers. All 4 Stages are premeasured for your tumbler, just pour and roll! It Can’t get easier than that!
- Each 12lb kit contains the following: 12oz of course 60/90 silicon carbide grit, 12oz of fine 120/220 silicon carbide grit, 6oz of pre polish 400/600 silicon carbide grit, 6oz of MJR Tumblers Exclusive 12,000 grit Extreme Aluminum Oxide Polish
- MJR Tumblers is Proud to be an American company located in Pecatonica Illinois in the good ole USA!
- Includes easy to understand rock polishing instructions with lots of tips and tricks with every purchase from MJR Tumblers!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07F3LNC55 |
| Best Sellers Rank | #88,920 in Toys & Games ( See Top 100 in Toys & Games ) #26 in Kids' Rock Tumblers |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,185) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.25 pounds |
| Manufacturer | MJR Tumblers |
| Manufacturer recommended age | 8 months - 12 years |
| Package Dimensions | 8.58 x 5.24 x 1.73 inches |

## Images

![Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 12lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned - Image 1](https://m.media-amazon.com/images/I/61aeQRPy1vL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ This is TRUE GRIT!
*by J***E on December 15, 2025*

This is simply some of the best quality tumbler grit I have used. If you do the first three stages properly, then the 12,000 girt polish will be perfect. All in all this is good, works well in each stage, easy to use. the only thing that might make it better would be to package it in bottles instead of bags, but honestly, that's about it.

### ⭐⭐⭐⭐⭐ Passion-fueled and high quality
*by K***A on July 11, 2025*

This grit and polish set is exceptional. You can tell it was crafted by people who genuinely care — not just about rocks, but about the process and purpose. This company emanates expertise and enthusiasm, and that shows in the results. My rocks came out more beautiful than ever and I would prefer to buy only from these rock guys. The picture is of some rocks from my apartment landscaping after the process . The instructions are detailed but easy to follow. It’s not your typical instruction manual, rather a sincere document created by the seller from the heart (their tips and tricks included!). It’s really unique and special. I’ve been using a “gimmicky” tumbler set for my HS STEM program and at home with my kids. As a teacher, is a great tool for many lessons and even many subjects.

### ⭐⭐⭐⭐⭐ MAKES TUMBLING ROCKS SO MUCH EASIER
*by A***P on September 3, 2025*

This grit works just like all others, if used correctly. It is so easy to open and pour it into tumbler--the perfect amount for a 10-lb tumbler. Highly recommended.

## Frequently Bought Together

- Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 12lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned
- 2 LBS Rock Tumbling Ceramic Filler Medi Rock Tumbling Ceramic Filler Media Non- Abrasive Ceramic Pellets for All Type Tumblers 3/16" X 3/8"

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**Shop now:** [https://www.desertcart.sk/products/77741311-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish](https://www.desertcart.sk/products/77741311-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-28*