--- product_id: 652437811 title: "400/600 Grit 5lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit" brand: "mjr tumblers" price: "369.99 DT" currency: TND in_stock: true category: "Mjr Tumblers" url: https://www.desertcart.tn/products/652437811-400-600-grit-5lb-aluminum-oxide-rock-tumbler-pre-polish store_origin: TN region: Tunisia --- # Rotary & vibratory compatible 400/600 grit precision USA veteran-owned quality 400/600 Grit 5lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit **Brand:** mjr tumblers **Price:** 369.99 DT **Availability:** ✅ In Stock ## Summary > ✨ Elevate your rock polish game—because your stones deserve the spotlight! ⚡ ## Quick Answers - **What is this?** 400/600 Grit 5lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit by mjr tumblers - **How much does it cost?** 369.99 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/652437811-400-600-grit-5lb-aluminum-oxide-rock-tumbler-pre-polish) ## 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 - • **Multi-Material Mastery:** Perfect for stones, minerals, and glass—expand your creative horizons. - • **Trusted USA Veteran Brand:** Support quality and integrity with a veteran-owned company delivering reliable results. - • **Premium Aluminum Oxide Power:** Consistent abrasion ensures uniform surface refinement every time. - • **Flawless Pre-Polish Precision:** Stage 3 grit smooths stones, erasing scratches for a flawless finish. - • **Versatile Tumbling Compatibility:** Works seamlessly with both rotary and vibratory tumblers—no limits to your craft. ## Overview MJR Tumblers 400/600 Grit Aluminum Oxide Pre-Polish is a premium stage 3 lapidary grit designed for smooth, scratch-free stone surfaces. Compatible with rotary and vibratory tumblers, this 5lb pack delivers consistent, even abrasion on stones, glass, and minerals. Proudly USA veteran-owned, it ensures dependable quality for serious hobbyists and professionals alike. ## Description MJR Tumblers 400/600 Grit 5lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit: desertcart.com: Industrial & Scientific ## Features - STAGE 3 PRE-POLISH FOR SMOOTH TRANSITION: This 400/600 grit aluminum oxide is designed for the third stage of rock tumbling, refining stone surfaces after initial shaping and smoothing. Helps prepare rocks for final polishing by reducing visible scratches and improving surface consistency. - PREMIUM ALUMINUM OXIDE FOR CONSISTENT RESULTS: Made from high-quality aluminum oxide, this grit provides reliable performance during the pre-polish stage. Designed to deliver even abrasion across stones, helping achieve a smooth and uniform finish before final polishing. - COMPATIBLE WITH ROTARY & VIBRATORY TUMBLERS: Suitable for use with most rock tumblers, including rotary and vibratory machines. A versatile option for maintaining your rock polishing process or replacing stage 3 grit in your workflow. - IDEAL FOR ROCKS, GLASS & LAPIDARY USE: Can be used for polishing stones, minerals, and even glass materials. Provides flexibility for a range of polishing applications, making it a useful addition to any rock tumbling setup. - USA OWNED BRAND WITH TRUSTED QUALITY: Offered by a USA-based, disabled and veteran-owned company. MJR Tumblers provides dependable rock tumbling supplies designed for consistent performance and ease of use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CP8WG7SW | | Best Sellers Rank | #38,461 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #50 in Tumbling Media | | Brand | MJR Tumblers | | Brand Name | MJR Tumblers | | Compatible Material | Glass, Stone | | Customer Reviews | 4.4 out of 5 stars 21 Reviews | | Grit Material | Aluminum Oxide | | Grit Material Type | Aluminum Oxide | | Grit Number | 600 | | Grit Type | Super Fine | | Included Components | Instructions and Grit | | Item Weight | 5 pounds | | Manufacturer | MJR Tumblers | | Material | Aluminum Oxide, Silicon Carbide | | Material Type | Aluminum Oxide, Silicon Carbide | | Number of Items | 1 | | Part Number | MJR5p400/600AO | | Unit Count | 1 Count | ## Product Details - **Brand:** MJR Tumblers - **Grit Material:** Premium Quality Aluminum Oxide - **Grit Type:** Super Fine - **Item Weight:** 5 pounds - **Material:** Premium Quality Aluminum Oxide ## Images ![400/600 Grit 5lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 1](https://m.media-amazon.com/images/I/51FmTcNLZ0L.jpg) ![400/600 Grit 5lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 2](https://m.media-amazon.com/images/I/71VEE0eqiZL.jpg) ![400/600 Grit 5lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 3](https://m.media-amazon.com/images/I/71d6xQMgukL.jpg) ![400/600 Grit 5lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 4](https://m.media-amazon.com/images/I/61UV0iJ0o5L.jpg) ![400/600 Grit 5lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 5](https://m.media-amazon.com/images/I/71cJ5kYQK2L.jpg) ## Available Options This product comes in different **Size, Style** options. ## Frequently Bought Together - 5lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA - 1 Pound of MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Rock Polishing Powder. for Unparalleled Quality and Performance. A Disabled and Veteran Owned Company! - 8 lbs Tumbler Media Grit,Polish 1500 Fine Aluminum Oxide, Step 4 for Tumbling Stones,Rock Polishing Grit Media, Works with Any Rock Tumbler --- ## 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/652437811-400-600-grit-5lb-aluminum-oxide-rock-tumbler-pre-polish](https://www.desertcart.tn/products/652437811-400-600-grit-5lb-aluminum-oxide-rock-tumbler-pre-polish) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-23*