--- product_id: 77741311 title: "Rock Tumbler Grit Kit Refill for 12lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers" brand: "mjr tumblers" price: "$80.51" currency: USD in_stock: true reviews_count: 13 category: "Mjr Tumblers" url: https://www.desertcart.us/products/77741311-rock-tumbler-grit-kit-refill-for-12lb-tumblers-4-step store_origin: US region: United States of America --- # ultra-fine 12,000 grit polish finish compatible with rotary & vibratory tumblers 4-stage precision grit system Rock Tumbler Grit Kit Refill for 12lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers **Brand:** mjr tumblers **Price:** $80.51 **Availability:** ✅ In Stock ## Summary > ✨ Elevate your stones from raw to remarkable—polish like a pro! ⚙️ ## Quick Answers - **What is this?** Rock Tumbler Grit Kit Refill for 12lb 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?** $80.51 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/77741311-rock-tumbler-grit-kit-refill-for-12lb-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 - • **Sub-Micron Polish Power:** 12,000 grit aluminum oxide delivers that showroom-worthy, mirror-smooth finish - • **Universal Compatibility:** Seamlessly works with both rotary and vibratory tumblers—flex your setup - • **Flawless 4-Stage Polishing:** From rough to refined—coarse to ultra-fine grit for museum-quality shine - • **Pre-Measured for Effortless Use:** Perfectly portioned for 12lb tumblers—no guesswork, just results - • **Veteran-Owned Quality Assurance:** Proudly USA-made grit kit from a trusted disabled veteran-owned brand ## Overview This Rock Tumbler Grit Kit Refill offers a complete 4-step silicon carbide and aluminum oxide polishing system, pre-measured for 12lb tumblers. Compatible with rotary and vibratory models, it ensures a smooth, professional-grade finish with its ultra-fine 12,000 grit polish. Made by a USA-based veteran-owned company, it combines quality materials with ease of use for hobbyists and pros alike. ## Description Product description Review: Works well - Good product 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. ## Features - COMPLETE 4-STAGE ROCK POLISHING SYSTEM: This refill grit kit includes all four essential stages of rock tumbling—coarse (60/90), fine (120/220), pre-polish (400/600), and ultra-fine 12,000 grit aluminum oxide polish. Designed to guide stones from rough surfaces to a smooth, polished finish. - 12,000 GRIT ULTRA-FINE POLISH FOR FINAL FINISH: The included sub-micron aluminum oxide polish is designed for the final stage, helping bring out a smooth, refined surface. Ideal for achieving a clean and polished appearance after shaping and smoothing stages - PRE-MEASURED FOR 12LB TUMBLERS – EASY TO USE: Each stage is pre-measured specifically for 12lb rock tumblers, simplifying the polishing process. Just add the contents at each stage and let the tumbler do the work—no complicated measuring required - COMPATIBLE WITH ROTARY & VIBRATORY TUMBLERS: Works with most rock tumblers, including rotary and vibratory models. A versatile grit refill option for maintaining your polishing workflow or restocking supplies. - USA OWNED BRAND WITH QUALITY MATERIALS: Offered by a USA-based, disabled and veteran-owned company. MJR Tumblers provides reliable rock tumbling supplies designed for consistent performance and ease of use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07F3LNC55 | | Age Range Description | 7 to 100 | | Brand Name | MJR Tumblers | | Color | Grey | | Customer Reviews | 4.5 out of 5 stars 1,263 Reviews | | Educational Objective | Learn about rock types and mineral properties through hands-on polishing activities | | Is Assembly Required | No | | Item Weight | 36 Ounces | | Manufacturer | MJR Tumblers | | Manufacturer Maximum Age (MONTHS) | 144 | | Manufacturer Minimum Age (MONTHS) | 8.0 | | Manufacturer Part Number | MJR12pgk | | Material Type | Aluminum Oxide, Plastic Pellets, Silicon Carbide | | Operation Mode | Manual | | Power Source | manual | | Set Name | 12 lb Tumbler Kit | | Size | for 12lb barrel | | Supported Battery Types | No batteries required | | Theme | Geology | | Unit Count | 1.0 Count | ## Images ![Rock Tumbler Grit Kit Refill for 12lb 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) ![Rock Tumbler Grit Kit Refill for 12lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers - Image 2](https://m.media-amazon.com/images/I/71SVNiXuCwL.jpg) ![Rock Tumbler Grit Kit Refill for 12lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers - Image 3](https://m.media-amazon.com/images/I/71ENSH8w-mL.jpg) ![Rock Tumbler Grit Kit Refill for 12lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers - Image 4](https://m.media-amazon.com/images/I/61mhoieNFpL.jpg) ![Rock Tumbler Grit Kit Refill for 12lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers - Image 5](https://m.media-amazon.com/images/I/71u-VNXNY6L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works well *by L***E on March 26, 2026* Good product ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ good product for polishing *by J***Z on May 22, 2026* good product, just what i needed ## 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 12lb 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" --- ## 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/77741311-rock-tumbler-grit-kit-refill-for-12lb-tumblers-4-step](https://www.desertcart.us/products/77741311-rock-tumbler-grit-kit-refill-for-12lb-tumblers-4-step) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-11*