---
product_id: 77741278
title: "Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 15lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned"
brand: "mjr tumblers"
price: "€ 78.97"
currency: EUR
in_stock: true
reviews_count: 13
category: "Mjr Tumblers"
url: https://www.desertcart.fi/products/77741278-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish
store_origin: FI
region: Finland
---

# Complete 4-stage silicon carbide grit set 12,000 grit sub-micron polish 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 15lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned

**Brand:** mjr tumblers
**Price:** € 78.97
**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 15lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned by mjr tumblers
- **How much does it cost?** € 78.97 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/77741278-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

- • **Versatile Compatibility:** Designed for all 15lb rotary and vibratory tumblers, ensuring seamless integration with your existing setup.
- • **Expert Guidance Included:** Unlock pro tips and easy-to-follow instructions that elevate your rock tumbling from hobby to art.
- • **Unmatched Ultra-Fine Polish:** Experience the pinnacle of shine with our exclusive 12,000 grit sub-micron aluminum oxide polish—your rocks deserve the best.
- • **Crafted with Purpose & Pride:** Support a Disabled and Veteran Owned American company dedicated to quality, expertise, and passion in every batch.
- • **All-in-One Premeasured Grit Kit:** Simplify your tumbling with perfectly portioned coarse, fine, pre-polish, and polish stages—just pour and roll for flawless results.

## Overview

The MJR Tumblers Refill Grit Kit delivers a premium 4-stage silicon carbide grit system topped with an exclusive 12,000 grit sub-micron aluminum oxide polish. Perfectly premeasured for 15lb rotary and vibratory tumblers, this kit guarantees unparalleled rock polishing results. Proudly crafted by a Disabled and Veteran Owned American company, it includes expert instructions to ensure every user achieves professional-grade shine with ease.

## Description

Buy Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 15lb 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 15lb tumbler kit contains the following: 16oz of course 60/90 silicon carbide grit, 16oz of fine 120/220 silicon carbide grit, 8oz of pre polish 400/600 silicon carbide grit, 8oz 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 | B07F3Q72YD |
| Best Sellers Rank | #12,495 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #12 in Tumbling Media |
| Brand | MJR Tumblers |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,187) |
| Grit Material | Aluminum Oxide; Silicon Carbide |
| Grit Number | 12000 |
| Grit Type | Coarse; Fine; Pre Polish; Polish |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.19 pounds |
| Item dimensions L x W x H | 8 x 6 x 1.5 inches |
| Item model number | MJR15pgk |
| Manufacturer | MJR Tumblers |
| Material | Aluminum Oxide, Silicon Carbide |
| Number of Items | 4 |
| Product Dimensions | 8 x 6 x 1.5 inches |

## Product Details

- **Brand:** MJR Tumblers
- **Grit Material:** Aluminum Oxide; Silicon Carbide
- **Grit Type:** Coarse; Fine; Pre Polish; Polish
- **Item dimensions L x W x H:** 8 x 6 x 1.5 inches
- **Material:** Aluminum Oxide, Silicon Carbide

## Images

![Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 15lb 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

- MJR Tumblers Refill Grit Kit for 15 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish
- Hiceeden 8 Pounds Rock Tumbling Filler Media, 1/5" x 2/5" Reusable Cylinder Ceramic Pellets Non-Abrasive for Rock Tumbler, Stone Polisher
- 8 LBS 3/16" X 3/8" Rock Tumbling Ceramic Filler Media Non-Abrasive Ceramic Pellets for All Type Tumblers

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**Shop now:** [https://www.desertcart.fi/products/77741278-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish](https://www.desertcart.fi/products/77741278-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-01-29*