--- product_id: 393590405 title: "Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish" brand: "mjr tumblers" price: "870.92 DT" currency: TND in_stock: true reviews_count: 5 category: "Mjr Tumblers" url: https://www.desertcart.tn/products/393590405-refill-grit-kit-for-18-lb-rock-tumblers-silicon-carbide store_origin: TN region: Tunisia --- # pre-measured for 18lb tumblers 4-stage precision grit system USA veteran-owned quality Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish **Brand:** mjr tumblers **Price:** 870.92 DT **Availability:** ✅ In Stock ## Summary > ✨ Elevate your rock game with pro-grade polish perfection! ## Quick Answers - **What is this?** Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish by mjr tumblers - **How much does it cost?** 870.92 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/393590405-refill-grit-kit-for-18-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 - • **Effortless Precision:** Pre-measured doses tailored for 18lb tumblers—no guesswork, just results - • **Flawless 4-Stage Polish:** From rough to mirror-smooth with coarse to ultra-fine grit - • **Universal Compatibility:** Seamlessly works with rotary & vibratory tumblers for versatile use - • **Trusted Veteran-Owned Brand:** Support quality and reliability from a USA-based disabled veteran company - • **Premium Silicon Carbide Blend:** Faster, sharper cutting with high-purity green/black silicon carbide grit ## Overview This MJR Tumblers Refill Grit Kit delivers a complete 4-stage polishing system with pre-measured silicon carbide and aluminum oxide grits designed specifically for 18lb rock tumblers. Compatible with rotary and vibratory models, it ensures a smooth, professional finish from coarse shaping to ultra-fine polishing. Proudly made by a USA veteran-owned brand, it combines premium materials and ease of use to transform rough stones into stunning polished gems. ## Description Grit Kit for 18 pound Rock Tumblers18 ounces of 60/90 Graded Silicon Carbide Grit (Step 1) 18 ounces of 120/220 Graded Silicon Carbide Grit (Step 2) 9 ounces of 500/600 Graded Silicon Carbide Grit (Step 3) 9 ounces of 1200 Aluminum Oxide Polish (Step 4) Comes with FREE Polishing Instructions We use a superior blend of Green/Black Silicon Carbide for our first stage. Green Silicon Carbide is of higher purity than Black Silicon Carbide, therefore it will work faster than Black Silicon Carbide because it's harder and stays sharper longer. MJR Tumblers offers 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 and 1200). These can be purchased individually in any weight denomination that fits your needs or we have pre-made kits for your specific size tumbler. We have kits available with or without plastic pellets. Review: Will buy again - I purchased a rock tumbler, the first time I uses it I used the grit it came with. I wasn't happy with results. So looked into different grit. I only used the shine grit ( last stage) on the rocks that had already been tumbled with a shine grit and I was surprised at the difference. I haven't used the others but I'm sure the quality is just as good. Review: Only 4lbs - Just received my package... but its just 4lbs. Read carefully,. Don't be tricked, it has nothing to do with "18lbs tumblers". Yes, i was expecting 18lbs of grit, fealing deceived with only 4. ## 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 18LB TUMBLERS – EASY TO USE: Each stage is pre-measured specifically for 18lb 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 | B07F75K1WR | | Brand | MJR Tumblers | | Brand Name | MJR Tumblers | | Compatible Material | Aluminium | | Customer Reviews | 4.5 out of 5 stars 175 Reviews | | Grit Material | Aluminum Oxide,Silicon Carbide | | Grit Material Type | Aluminum Oxide,Silicon Carbide | | Grit Number | 60 | | Grit Type | Medium | | Item Dimensions | 20.3 x 15.2 x 3.8 Centimeters | | Item dimensions L x W x H | 20.3 x 15.2 x 3.8 Centimeters | | Manufacturer | MJR Tumblers | | Material | Aluminium Oxide , Silicon Carbide | | Material Type | Aluminium Oxide, Silicon Carbide | | Model Number | MJR18pgk | | Number of Items | 4 | | Part Number | MJR18pgk | | Unit Count | 1.0 Count | ## Product Details - **Material:** Aluminium Oxide, Silicon Carbide - **Grit Material:** Aluminum Oxide,Silicon Carbide - **Item dimensions L x W x H:** 20.3 x 15.2 x 3.8 Centimeters - **Brand:** MJR Tumblers - **Grit Type:** Medium ## Images ![Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish - Image 1](https://m.media-amazon.com/images/I/61aeQRPy1vL.jpg) ## Questions & Answers **Q: Does the polish give the rocks a shiny wet look?** A: yes but if you have a glaze on your stones, clean of the polish and re-run with plain water and ivory soap. This will get you the wet look you are seeking **Q: How do i convert oz into tbsp? i have a 1 lb tumbler and it says to add 1oz of grit, how many tablespoons is that?** A: 1 tbs is half a fluid oz. Generally I add about 1 tbs of grit per pound on steps 1 and 2, and half that for steps 3 and 4. Hopefully this helps. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Will buy again *by K***E on 30 January 2025* I purchased a rock tumbler, the first time I uses it I used the grit it came with. I wasn't happy with results. So looked into different grit. I only used the shine grit ( last stage) on the rocks that had already been tumbled with a shine grit and I was surprised at the difference. I haven't used the others but I'm sure the quality is just as good. ### ⭐ Only 4lbs *by T***N on 16 September 2024* Just received my package... but its just 4lbs. Read carefully,. Don't be tricked, it has nothing to do with "18lbs tumblers". Yes, i was expecting 18lbs of grit, fealing deceived with only 4. ### ⭐⭐⭐⭐⭐ good product for polishing *by J***Z on 22 May 2026* good product, just what i needed --- ## 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.tn/products/393590405-refill-grit-kit-for-18-lb-rock-tumblers-silicon-carbide](https://www.desertcart.tn/products/393590405-refill-grit-kit-for-18-lb-rock-tumblers-silicon-carbide) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-02*