--- product_id: 686824544 title: "Rock Grit Kit for 4.5kg Tumbler" brand: "mjr tumblers" price: "$104.60" currency: USD in_stock: true reviews_count: 7 category: "Mjr Tumblers" url: https://www.desertcart.us/products/686824544-rock-grit-kit-for-4-5kg-tumbler store_origin: US region: United States of America --- # 12,000 grit ultra-fine polish Pre-measured for 10lb tumblers 4-stage precision grit system Rock Grit Kit for 4.5kg Tumbler **Brand:** mjr tumblers **Price:** $104.60 **Availability:** ✅ In Stock ## Summary > 💎 Polish Like a Pro, Shine Like a Star! ## Quick Answers - **What is this?** Rock Grit Kit for 4.5kg Tumbler by mjr tumblers - **How much does it cost?** $104.60 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/686824544-rock-grit-kit-for-4-5kg-tumbler) ## 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 - • **Universal Compatibility:** Works seamlessly with rotary and vibratory tumblers for versatile use. - • **Proudly USA-Owned Quality:** Veteran-owned brand delivering reliable, premium tumbling grit every time. - • **Effortless Pre-Measured Packs:** No guesswork—perfectly portioned for 10lb tumblers to save time and mess. - • **Ultra-Fine 12,000 Grit Polish:** Achieve museum-quality shine with sub-micron aluminum oxide polish. - • **Complete 4-Stage Polishing Power:** From rough to refined—coarse to ultra-fine grit for flawless stones. ## Overview The MJR Tumblers Rock Grit Kit is a complete 4-stage polishing system designed for 10lb rock tumblers, featuring coarse to ultra-fine 12,000 grit aluminum oxide polish. Pre-measured for convenience and compatible with rotary and vibratory tumblers, this USA veteran-owned brand kit ensures consistent, high-quality rock polishing results with minimal effort. ## Description MJR Tumblers Rock Grit Kit for 4.5kg Tumbler : desertcart.co.uk: Home & Kitchen Review: arrived safe - fast delivery from the US to the UK arrived with NO leakage of grit. Was confused about the amount as said 50lbs was thinking that was the wieght of it, but after checking more I realised was for a 50lb tumbler size . So was spot on wieghing 9lb. 60z. Review: Not 6lbs - There was loose grit all over the packaging which had to be thrown away and meant the grits were contaminated with other grades of grit so unusable ## 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 10LB TUMBLERS – EASY TO USE: Each stage is pre-measured specifically for 10lb 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 | B07FHLKRY1 | | Age Range Description | Kid | | Brand Name | MJR Tumblers | | Colour | Grey | | Customer Reviews | 4.5 out of 5 stars 303 Reviews | | Educational Objective | Develop patience and understanding of multi-step processes through rock tumbling. | | Indoor Outdoor Usage | Indoor | | Is Assembly Required | No | | Item Weight | 30 Ounces | | Manufacturer | MJR Tumblers | | Manufacturer Part Number | MJR10pgk | | Manufacturer recommended age | 8 months - 8 years | | Material Type | Silicon Carbide Aluminum Oxide Plastic Pellets | | Model Number | MJR10pgk | | Number of Packs | 1 | | Operation Mode | Manual | | Set Name | 10 lb | | Size | for 10lb barrel | | Supported Battery Types | No batteries required | | Theme | Nature | | Unit Count | 1.0 count | ## Images ![Rock Grit Kit for 4.5kg Tumbler - Image 1](https://m.media-amazon.com/images/I/61aeQRPy1vL.jpg) ![Rock Grit Kit for 4.5kg Tumbler - Image 2](https://m.media-amazon.com/images/I/71SVNiXuCwL.jpg) ![Rock Grit Kit for 4.5kg Tumbler - Image 3](https://m.media-amazon.com/images/I/71ENSH8w-mL.jpg) ![Rock Grit Kit for 4.5kg Tumbler - Image 4](https://m.media-amazon.com/images/I/61mhoieNFpL.jpg) ![Rock Grit Kit for 4.5kg Tumbler - Image 5](https://m.media-amazon.com/images/I/71u-VNXNY6L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ arrived safe *by S***O on 20 March 2026* fast delivery from the US to the UK arrived with NO leakage of grit. Was confused about the amount as said 50lbs was thinking that was the wieght of it, but after checking more I realised was for a 50lb tumbler size . So was spot on wieghing 9lb. 60z. ### ⭐⭐⭐ Not 6lbs *by L***E on 3 March 2025* There was loose grit all over the packaging which had to be thrown away and meant the grits were contaminated with other grades of grit so unusable ### ⭐⭐⭐⭐⭐ Excellent produit *by A***R on 10 July 2026* Commande arrivé en temps et en excellente condition. ## 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/686824544-rock-grit-kit-for-4-5kg-tumbler](https://www.desertcart.us/products/686824544-rock-grit-kit-for-4-5kg-tumbler) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-17*