--- product_id: 500431761 title: "Rock Tumbler Grit Kit Refill for 6lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers" brand: "mjr tumblers" price: "¥14399" currency: JPY in_stock: true category: "Mjr Tumblers" url: https://www.desertcart.jp/products/500431761-rock-tumbler-grit-kit-refill-for-6lb-tumblers-4-step store_origin: JP region: Japan --- # compatible with rotary & vibratory tumblers 4-stage precision grit system USA veteran-owned quality Rock Tumbler Grit Kit Refill for 6lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers **Brand:** mjr tumblers **Price:** ¥14399 **Availability:** ✅ In Stock ## Summary > ✨ Polish like a pro, shine like a star! ✨ ## Quick Answers - **What is this?** Rock Tumbler Grit Kit Refill for 6lb 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?** ¥14399 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/500431761-rock-tumbler-grit-kit-refill-for-6lb-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 - • **Flawless 4-Stage Polishing:** From rough to mirror-smooth with coarse to ultra-fine 12,000 grit polish - • **Educational & Fun for All Ages:** Ideal for geology enthusiasts aged 7 to 100, blending learning with hands-on creativity - • **Pre-Measured for Effortless Use:** Perfectly portioned for 6lb tumblers—no guesswork, just results - • **Universal Tumbler Compatibility:** Seamlessly works with both rotary and vibratory models for versatile polishing - • **Veteran-Owned Quality Assurance:** Crafted by a USA-based disabled veteran-owned brand committed to excellence ## Overview The MJR Tumblers Rock Tumbler Grit Kit Refill is a comprehensive 4-step polishing system designed for 6lb rock tumblers. Featuring silicon carbide grits and a premium 12,000 grit aluminum oxide polish, it delivers a flawless finish compatible with rotary and vibratory tumblers. Pre-measured for convenience and crafted by a USA veteran-owned company, this kit is perfect for hobbyists and educators aiming to transform rough stones into polished gems. ## Description Buy MJR Tumblers Rock Tumbler Grit Kit Refill for 6lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers: Rock Tumblers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## 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 6LB TUMBLERS – EASY TO USE: Each stage is pre-measured specifically for 6lb 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 | B07F1FCPZH | | Age Range Description | 7 to 100 | | Brand Name | MJR Tumblers | | Color | Grey | | Customer Reviews | 4.5 out of 5 stars 1,307 Reviews | | Educational Objective | Teach children about geology and the process of tumbling and polishing rocks | | Item Weight | 1.1 pounds | | Manufacturer | MJR Tumblers | | Manufacturer Part Number | MJR6pgk | | Manufacturer recommended age | 8 months - 10 years | | Material Type | Aluminum Oxide, Plastic Pellets, Silicon Carbide | | Number of Packs | 4 | | Operation Mode | Manual | | Power Source | Hand-powered | | Set Name | 6 lb Tumbler Kit | | Size | for 6lb barrel | | Supported Battery Types | No batteries required | | Theme | Geology | | Unit Count | 1 Count | ## Product Details - **Material:** Silicon Carbide, Aluminum Oxide - **Grit Material:** Silicon Carbide, Aluminum Oxide - **Item dimensions L x W x H:** 8 x 6 x 2.25 inches - **Brand:** MJR Tumblers - **Grit Type:** Coarse, Fine, Ultra Fine ## Images ![Rock Tumbler Grit Kit Refill for 6lb 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 6lb 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 6lb 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 6lb 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 6lb 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. ## Frequently Bought Together - MJR Tumblers Refill Grit Kit for 25 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 --- ## 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.jp/products/500431761-rock-tumbler-grit-kit-refill-for-6lb-tumblers-4-step](https://www.desertcart.jp/products/500431761-rock-tumbler-grit-kit-refill-for-6lb-tumblers-4-step) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-15*