---
product_id: 603410932
title: "4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA"
brand: "mjr tumblers"
price: "€ 68.40"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.pt/products/603410932-4lb-of-mjr-tumblers-premium-400-600-pre-polish-aluminum
store_origin: PT
region: Portugal
---

# Veteran & disabled owned 400/600 grit precision Proudly USA made 4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA

**Brand:** mjr tumblers
**Price:** € 68.40
**Availability:** ✅ In Stock

## Summary

> ⚙️ Polish like a pro, powered by American grit!

## Quick Answers

- **What is this?** 4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA by mjr tumblers
- **How much does it cost?** € 68.40 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/603410932-4lb-of-mjr-tumblers-premium-400-600-pre-polish-aluminum)

## 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

- • **American Pride:** Support a veteran and disabled-owned business proudly based in the USA.
- • **Bulk Value Pack:** 4 pounds of high-quality grit ensures you never run out mid-project.
- • **Stage 3 Perfection:** Achieve flawless stone shaping with premium 400/600 grit aluminum oxide.
- • **Next-Level Polishing:** Elevate your stones to museum-quality shine and smoothness.
- • **Universal Compatibility:** Works seamlessly with any rock tumbler brand—no limits, just results.

## Overview

This 4lb pack of premium 400/600 grit aluminum oxide polishing grit is designed for the critical third stage of rock tumbling, compatible with all tumbler brands. Proudly made in the USA by a disabled and veteran-owned company, it delivers consistent, high-quality results for professional-grade stone polishing.

## Description

Full description not available

## Features

- Premium Quality 400/600 Grit Aluminum Oxide
- Compatible with ANY Brand of Rock Tumbler
- This Grit is For the Third Stage Shaping of Your Stones
- MJR Tumblers is a Disabled and Veteran Owned Company!
- Buy American, MJR Tumblers is Proud to be an American Owned Company Located in Pecatonica Illinois in the Good Ole USA!

## Product Details

- **Material:** Premium Quality Aluminum Oxide
- **Grit Material:** Premium Quality Aluminum Oxide
- **Brand:** MJR Tumblers
- **Grit Type:** Super Fine
- **Item Weight:** 4 Pounds

## Images

![4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA - Image 1](https://m.media-amazon.com/images/I/51FmTcNLZ0L.jpg)
![4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA - Image 2](https://m.media-amazon.com/images/I/71VEE0eqiZL.jpg)
![4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA - Image 3](https://m.media-amazon.com/images/I/71d6xQMgukL.jpg)
![4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA - Image 4](https://m.media-amazon.com/images/I/61UV0iJ0o5L.jpg)
![4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA - Image 5](https://m.media-amazon.com/images/I/71cJ5kYQK2L.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing product very satisfied :)
*by K***N on May 11, 2025*

Amazing. I was about to give up because my rocks were just not getting polished very smooth but not polished read the reviews for this product and decided to try it . I'm only on day 4 of polishing with the 12000 grit and my rocks already look amazing. Will 100% be buying again in the future!

### ⭐⭐⭐⭐⭐ 5 stars
*by H***H on April 28, 2025*

Works great to further polish rocks while tumbling

### ⭐⭐⭐⭐⭐ Perfection takes time.
*by D***N on March 28, 2025*

Be patient tumble a long time and you will be amazed how shiny your rocks will be. Just remember that the finished piece is no better than the base underneath the final finish. Like a paint job on your car, if there are rough patches they’ll still be there at the end.

## Frequently Bought Together

- 4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA
- 4lb of MJR Tumblers Premium 120/220 Fine Silicon Carbide Rock Polishing Grit for Step/Stage 2, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA
- 10 lbs Rock Tumbler Grit - Tumbler Media Grit,Rock Polishing Grit Media, Works with Any Rock Tumbler, Rock Polisher, Stone Polisher,COARSE 60/90 Silicon Carbide Grit, Step 1 for Tumbling Stones

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**Shop now:** [https://www.desertcart.pt/products/603410932-4lb-of-mjr-tumblers-premium-400-600-pre-polish-aluminum](https://www.desertcart.pt/products/603410932-4lb-of-mjr-tumblers-premium-400-600-pre-polish-aluminum)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-01-22*