--- product_id: 218138850 title: "Rock Tumbler Grit Kit Refill for 10lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers" brand: "mjr tumblers" price: "$60.23" currency: USD in_stock: true reviews_count: 13 category: "Mjr Tumblers" url: https://www.desertcart.us/products/218138850-rock-tumbler-grit-kit-refill-for-10lb-tumblers-4-step store_origin: US region: United States of America --- # 4-stage premeasured silicon carbide grit 12,000 grit sub-micron polish Proud Disabled & Veteran Owned USA brand Rock Tumbler Grit Kit Refill for 10lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers **Brand:** mjr tumblers **Price:** $60.23 **Availability:** ✅ In Stock ## Summary > ✨ Polish Like a Pro, Rock the Results! 🪨 ## Quick Answers - **What is this?** Rock Tumbler Grit Kit Refill for 10lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers by mjr tumblers - **How much does it cost?** $60.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/218138850-rock-tumbler-grit-kit-refill-for-10lb-tumblers-4-step) ## 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 formulated for all rotary and vibratory tumblers, ensuring seamless integration with your existing setup. - • **Comprehensive User Guidance:** Includes expert tips and easy-to-follow instructions to elevate your tumbling game and avoid common pitfalls. - • **Unmatched Ultra-Fine Polish:** Experience the pinnacle of rock tumbling with our exclusive 12,000 grit aluminum oxide polish for mirror-like finishes. - • **Effortless 4-Stage Precision:** Premeasured grit stages tailored for 10lb tumblers—just pour and tumble for flawless results every time. - • **Veteran-Owned Quality Assurance:** Support a Disabled and Veteran owned American company dedicated to premium craftsmanship and customer care. ## 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, engineered for 10lb rock tumblers. Designed for ease and precision, this kit is premeasured for flawless use and backed by a Disabled and Veteran owned American company, making it the ultimate choice for enthusiasts seeking unparalleled polish quality and expert guidance. ## Description Buy 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: 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 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! - Includes easy to understand rock polishing instructions with lots of tips and tricks with every purchase from MJR Tumblers! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07FHLKRY1 | | Age Range Description | 7 to 100 | | Best Sellers Rank | #14,599 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Tumbling Media | | Brand Name | MJR Tumblers | | Customer Reviews | 4.4 4.4 out of 5 stars (1,220) | | Educational Objective | Team Building Skills | | Is Assembly Required | No | | Item Weight | 30 Ounces | | Manufacturer | MJR Tumblers | | Manufacturer Maximum Age (MONTHS) | 100 | | Manufacturer Minimum Age (MONTHS) | 8.0 | | Manufacturer Part Number | MJR10pgk | | Material Type | Aluminum Oxide, Plastic Pellets, Silicon Carbide | | Model Number | MJR10pgk | | Operation Mode | Manual | | Power Source | manual | | Set Name | 10 lb | | Size | for 10lb barrel | | Supported Battery Types | No batteries required | ## Images ![Rock Tumbler Grit Kit Refill for 10lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers - Image 1](https://m.media-amazon.com/images/I/61aeQRPy1vL.jpg) ## Available Options This product comes in different **Size** options. ## 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. ### ⭐⭐⭐⭐⭐ fair product *by J***R on March 20, 2026* as described ## 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 10lb 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" - Blue Marble National Geographic Rock Tumbling Media – GemFoam Reusable Rock Polisher Foam, Use After Rock Tumbling Grit Cycles, Adds Shine to Tumbled Rocks and Minerals, Rock Tumbling Supplies --- ## 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.us/products/218138850-rock-tumbler-grit-kit-refill-for-10lb-tumblers-4-step](https://www.desertcart.us/products/218138850-rock-tumbler-grit-kit-refill-for-10lb-tumblers-4-step) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-20*