--- product_id: 689924308 title: "Refill Grit Kit for 12 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish" brand: "mjr tumblers" price: "¥15907" currency: JPY in_stock: true category: "Mjr Tumblers" url: https://www.desertcart.jp/products/689924308-refill-grit-kit-for-12-lb-rock-tumblers-silicon-carbide store_origin: JP region: Japan --- # universal tumbler compatibility fast polishing cycle 4-stage grit system Refill Grit Kit for 12 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish **Brand:** mjr tumblers **Price:** ¥15907 **Availability:** ✅ In Stock ## Summary > 💎 Polish Like a Pro, Shine Like No Other! ## Quick Answers - **What is this?** Refill Grit Kit for 12 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish by mjr tumblers - **How much does it cost?** ¥15907 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/689924308-refill-grit-kit-for-12-lb-rock-tumblers-silicon-carbide) ## 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 - • **Fits Any Rock Tumbler:** Seamless compatibility with all brands means no limits on your polishing projects. - • **Speed Meets Precision:** Quickly transform rough stones into dazzling gems without sacrificing quality. - • **Long-Lasting Sharpness:** Premium silicon carbide stays sharper longer, delivering consistent results. - • **Whisper-Quiet & Durable:** Pair with MJR’s quiet, heavy-duty tumblers for a smooth, hassle-free polishing experience. - • **Pro-Grade 4-Step Grit Kit:** From coarse Silicon Carbide to fine Aluminum Oxide for flawless finishes every time. ## Overview The MJR Tumblers Refill Grit Kit for 12 LB rock tumblers features a professional-grade 4-step grit system combining coarse Silicon Carbide and fine Aluminum Oxide media. Designed for fast, high-quality polishing, it works universally with any rock tumbler brand. This kit ensures long-lasting sharpness and superior shine, making it ideal for hobbyists and professionals aiming to bring out the best in their gemstones. ## Description MJR Tumblers Refill Grit Kit for 12 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish : desertcart.co.uk: Home & Kitchen ## 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 | |---------------|-------| | ASIN | B07F3LNC55 | | Age Range Description | Kid | | Best Sellers Rank | 89,606 in Toys & Games ( See Top 100 in Toys & Games ) 4,282 in Learning & Education Toys | | Brand Name | MJR Tumblers | | Colour | Grey | | Customer Reviews | 4.5 4.5 out of 5 stars (303) | | Educational Objective | Learn about rock types and mineral properties through hands-on polishing activities | | Indoor Outdoor Usage | Indoor | | Is Assembly Required | No | | Item Weight | 36 Ounces | | Manufacturer | MJR Tumblers | | Manufacturer Part Number | MJR12pgk | | Manufacturer recommended age | 8 months and up | | Material Type | Aluminum Oxide Silicon Carbide | | Number of Packs | 1 | | Operation Mode | Automatic | | Set Name | MJR Tumblers Refill Grit Kit for 12 LB Rock Tumblers | | Size | 12 Lb | | Theme | Geology | ## Images ![Refill Grit Kit for 12 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish - Image 1](https://m.media-amazon.com/images/I/61aeQRPy1vL.jpg) ## Available Options This product comes in different **Size Name** options. ## 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.jp/products/689924308-refill-grit-kit-for-12-lb-rock-tumblers-silicon-carbide](https://www.desertcart.jp/products/689924308-refill-grit-kit-for-12-lb-rock-tumblers-silicon-carbide) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-15*