--- product_id: 569675370 title: "Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 10lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned" brand: "mjr tumblers" price: "€ 162.19" currency: EUR in_stock: true reviews_count: 5 category: "Mjr Tumblers" url: https://www.desertcart.hr/products/569675370-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish store_origin: HR region: Croatia --- # Premeasured 4-stage kit 12,000 grit sub-micron polish Proudly USA made, veteran owned Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 10lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned **Brand:** mjr tumblers **Price:** € 162.19 **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 10lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned by mjr tumblers - **How much does it cost?** € 162.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/569675370-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:** Perfectly designed for all 10lb rotary and vibratory rock tumblers. - • **Veteran & Disabled Owned:** Support a proud American company with every purchase. - • **Bonus Expert Instructions:** Free, easy-to-follow tips included to master your rock polishing journey. - • **Effortless 4-Stage System:** Premeasured grits for seamless use—just pour and tumble, no guesswork needed. - • **Unmatched 12,000 Grit Polish:** Experience the ultimate shine with our exclusive sub-micron aluminum oxide formula. ## Overview The MJR Tumblers Refill Grit Kit delivers a premium 4-stage polishing experience featuring an exclusive 12,000 grit sub-micron aluminum oxide polish. Designed for 10lb rock tumblers, this premeasured kit ensures flawless results with minimal effort. Proudly made in the USA by a disabled and veteran-owned company, it includes expert instructions to elevate your rock tumbling game. ## Description Product description Review: Will buy again - I purchased a rock tumbler, the first time I uses it I used the grit it came with. I wasn't happy with results. So looked into different grit. I only used the shine grit ( last stage) on the rocks that had already been tumbled with a shine grit and I was surprised at the difference. I haven't used the others but I'm sure the quality is just as good. Review: received - After 11 days, I received the grit! Polishes rocks nicely! ## 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 10lb kit contains the following: 10oz of course 60/90 silicon carbide grit, 10oz of fine 120/220 silicon carbide grit, 5oz of pre polish 400/600 silicon carbide grit, 5oz 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! - Free, easy to understand rock polishing instructions with lots of tips and tricks are included with every purchase from MJR Tumblers! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07FHLKRY1 | | Age Range Description | Kid | | Brand Name | MJR Tumblers | | Color | Grey | | Customer Reviews | 4.4 out of 5 stars 1,009 Reviews | | Educational Objective | Develop patience and understanding of multi-step processes through rock tumbling. | | Is Assembly Required | No | | Item Weight | 30 Ounces | | Manufacturer | MJR Tumblers | | Manufacturer Minimum Age (MONTHS) | 8.0 | | Manufacturer Part Number | MJR10pgk | | Material Type | Silicon Carbide Aluminum Oxide Plastic Pellets | | Model Number | MJR10pgk | | Operation Mode | Manual | | Power Source | Hand-powered | | Size | for 10lb barrel | | Supported Battery Types | No batteries required | | Theme | Nature | | Unit Count | 1.0 Count | ## Product Details - **Brand:** MJR Tumblers - **Grit material:** Silicon Carbide - **Grit type:** Coarse - **Item dimensions L x W x H:** 20.3 x 15.2 x 3.8 centimeters - **Material:** metal, carbide Aluminum ## Images ![Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 10lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned - Image 1](https://m.media-amazon.com/images/I/61aeQRPy1vL.jpg) ![Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 10lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned - Image 2](https://m.media-amazon.com/images/I/71SVNiXuCwL.jpg) ![Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 10lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned - Image 3](https://m.media-amazon.com/images/I/71ENSH8w-mL.jpg) ![Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 10lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned - Image 4](https://m.media-amazon.com/images/I/61mhoieNFpL.jpg) ![Refill Grit Kit w MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Result. For 10lb Rock Tumblers w Silicon Carbide, Disabled and Veteran Owned - Image 5](https://m.media-amazon.com/images/I/71u-VNXNY6L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Will buy again *by K***E on 30 January 2025* I purchased a rock tumbler, the first time I uses it I used the grit it came with. I wasn't happy with results. So looked into different grit. I only used the shine grit ( last stage) on the rocks that had already been tumbled with a shine grit and I was surprised at the difference. I haven't used the others but I'm sure the quality is just as good. ### ⭐⭐⭐⭐ received *by T***N on 29 March 2026* After 11 days, I received the grit! Polishes rocks nicely! ### ⭐⭐⭐⭐⭐ Worked as advertised *by A***Y on 27 August 2024* I'm new to rock tumbling, I've used a few different polishing grits and this is the best one so far. I ran this polish cycle for 7 days and am happy with the results. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/569675370-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish](https://www.desertcart.hr/products/569675370-refill-grit-kit-w-mjr-tumblers-premium-quality-extreme-polish) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-14*