---
product_id: 393590405
title: "MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish"
brand: "mjr tumblers"
price: "691.46 DT"
currency: TND
in_stock: true
url: https://www.desertcart.tn/products/393590405-mjr-tumblers-refill-grit-kit-for-18-lb-rock-tumblers
store_origin: TN
region: Tunisia
---

# premium Silicon Carbide & Aluminum Oxide 75% quieter tumbling experience 4-step grit progression MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish

**Brand:** mjr tumblers
**Price:** 691.46 DT
**Availability:** ✅ In Stock

## Summary

> 💎 Elevate Your Rock Game: Shine Brighter, Faster, Quieter!

## Quick Answers

- **What is this?** MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish by mjr tumblers
- **How much does it cost?** 691.46 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/393590405-mjr-tumblers-refill-grit-kit-for-18-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

- • **Complete Polishing Kit:** Includes all essential grits plus free expert polishing instructions to elevate your craft.
- • **Universal Compatibility:** Works seamlessly with any 18 lb rock tumbler brand—freedom to choose your gear.
- • **Whisper-Quiet Operation:** Engineered for a 75% noise reduction, so your workspace stays peaceful and productive.
- • **Pro-Grade 4-Step Grit System:** From coarse stock removal to mirror polish, every stage covered for flawless results.
- • **Premium Silicon Carbide Blend:** Harder, sharper, and longer-lasting grit for faster, superior polishing power.

## Overview

The MJR Tumblers Refill Grit Kit is a professional-grade 4-step polishing system designed for 18 lb rock tumblers. Featuring a superior blend of Silicon Carbide and Aluminum Oxide grits, it ensures rapid stock removal and a flawless finish. Compatible with any brand, this kit includes coarse to polish grits and free instructions, delivering a premium, quiet, and efficient tumbling experience.

## Description

Grit Kit for 18 pound Rock Tumblers18 ounces of 60/90 Graded Silicon Carbide Grit (Step 1) 18 ounces of 120/220 Graded Silicon Carbide Grit (Step 2) 9 ounces of 500/600 Graded Silicon Carbide Grit (Step 3) 9 ounces of 1200 Aluminum Oxide Polish (Step 4) Comes with FREE Polishing Instructions We use a superior blend of Green/Black Silicon Carbide for our first stage. Green Silicon Carbide is of higher purity than Black Silicon Carbide, therefore it will work faster than Black Silicon Carbide because it's harder and stays sharper longer. MJR Tumblers offers a large selection of heavy duty tumblers, a full range of silicon carbide grit (50, 80, 60/90, 500, 600, 500/600 and 1500) and aluminum oxide (400/600 and 1200). These can be purchased individually in any weight denomination that fits your needs or we have pre-made kits for your specific size tumbler. We have kits available with or without plastic pellets.

## Features

- COARSE, FINE, PRE-POLISH, AND POLISH KIT: Get the ideal results with this professionally-graded kit, starting from coarse Silicon Carbide Grit for quick stock removal to a finer Aluminum Oxide Polish Grit for a perfect finish. Get the job done quickly without compromising quality. A comprehensive kit that offers everything you need for sharpening and polishing.
- QUICK WAY TO MAKE ROCKS SHINE: Get ready to bring your gemstones to life with our rock polisher grit refill pack. Achieve the ultimate shine with our superior-grade Silicon Carbide from Coarse to Pre-polish and Aluminum Oxide for a Finer Polish. Refill your rock polisher with our high-quality grit, enough to give your rocks and gems the sparkle they deserve. Our premium-grade silicon carbide is harder and stays sharper longer, giving you an unbeatable polishing experience.
- POLISH INCREDIBLE ROCKS WITH MJR TUMBLERS: You'll have plenty of tumbling to do with MJR Tumblers. We offer a large selection of heavy-duty tumblers, a full range of silicon carbide grit (50, 80, 60/90, 500, 600, 500/600 and 1500), and aluminum oxide (400/600, 1200, and 1500). These can be purchased individually in a weight denomination that best fits your needs, we also have pre-made kits for your specific size tumbler. We also have kits available with or without plastic pellets.
- WORKS WITH ANY ROCK TUMBLER: No need to worry about compatibility. Our grit is designed to work with any rock tumbler from any brand, giving you the freedom of choice. Get smooth, polished rocks in no time without compromising on quality or performance!
- EASY TUMBLE EXPERIENCE: MJR Tumblers runs on a powerful motor with a leak-resistant rubber barrel that reduces sound, making it 75% quieter than other plastic models, and made to last a long time. Heavy-duty 16-gauge welded steel frame, powder coated. Equipped with heavy-duty stainless steel ball bearings. It also has a quick and easy-to-use heavy-duty rubber cap. Just Pour in the rough stones and grit, then let the machine do its job!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Aluminium Oxide, Silicon Carbide |
| Grit Material | Aluminum Oxide,Silicon Carbide |
| Item dimensions L x W x H | 20.3 x 15.2 x 3.8 Centimeters |
| Brand | MJR Tumblers |
| Grit Type | Medium |
| Grit Number | 60 |
| Number of Items | 4 |
| Manufacturer | MJR Tumblers |
| Model Number | MJR18pgk |
| Batteries Required | No |
| Batteries Included | No |
| Material Type(s) | Aluminium Oxide, Silicon Carbide |
| Product Dimensions | 20.32 x 15.24 x 3.81 cm; 1.83 kg |
| Item model number | MJR18pgk |
| Manufacturer recommended age | 8 months and up |
| Country of Origin | USA |
| Item Weight | 1 kg 830 g |

## Product Details

- **Material:** Aluminium Oxide, Silicon Carbide
- **Grit Material:** Aluminum Oxide,Silicon Carbide
- **Item dimensions L x W x H:** 20.3 x 15.2 x 3.8 Centimeters
- **Brand:** MJR Tumblers
- **Grit Type:** Medium

## Images

![MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish - Image 1](https://m.media-amazon.com/images/I/61aeQRPy1vL.jpg)
![MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish - Image 2](https://m.media-amazon.com/images/I/71SVNiXuCwL.jpg)
![MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish - Image 3](https://m.media-amazon.com/images/I/71ENSH8w-mL.jpg)
![MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish - Image 4](https://m.media-amazon.com/images/I/61mhoieNFpL.jpg)
![MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish - Image 5](https://m.media-amazon.com/images/I/71u-VNXNY6L.jpg)

## Questions & Answers

**Q: Does the polish give the rocks a shiny wet look?**
A: yes but if you have a glaze on your stones, clean of the polish and re-run with plain water and ivory soap. This will get you the wet look you are seeking

**Q: How do i convert oz into tbsp? i have a 1 lb tumbler and it says to add 1oz of grit, how many tablespoons is that?**
A: 1 tbs is half a fluid oz. 
Generally I add about 1 tbs of grit per pound on steps 1 and 2, and half that for steps 3 and 4. Hopefully this helps.

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-01-28*