--- product_id: 90981032 title: "Martyr Anodes, CMR03AL, Aluminum Rudder & Trim Tab Anode with Allen Screw – Marine Boat Sacrificial Anode for Saltwater & Brackish Corrosion Protection" brand: "martyr" price: "1119793₫" currency: VND in_stock: true reviews_count: 13 category: "Martyr" url: https://www.desertcart.vn/products/90981032-martyr-anodes-cmr03al-aluminum-rudder-and-trim-tab-anode-allen store_origin: VN region: Vietnam --- # Secure Allen screw fastener for easy install ISO 9001 certified precision diecast Triple alloy options for tailored corrosion defense Martyr Anodes, CMR03AL, Aluminum Rudder & Trim Tab Anode with Allen Screw – Marine Boat Sacrificial Anode for Saltwater & Brackish Corrosion Protection **Brand:** martyr **Price:** 1119793₫ **Availability:** ✅ In Stock ## Summary > 🛥️ Stay ahead of corrosion—protect your ride like a pro! ## Quick Answers - **What is this?** Martyr Anodes, CMR03AL, Aluminum Rudder & Trim Tab Anode with Allen Screw – Marine Boat Sacrificial Anode for Saltwater & Brackish Corrosion Protection by martyr - **How much does it cost?** 1119793₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/90981032-martyr-anodes-cmr03al-aluminum-rudder-and-trim-tab-anode-allen) ## Best For - martyr enthusiasts ## Why This Product - Trusted martyr brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Installation with Allen Screw:** Designed with a secure Allen screw fastener for quick, reliable mounting—no hassle, no downtime. - • **Precision Engineered for Ultimate Durability:** Crafted under strict ISO 9001 standards to ensure flawless performance and longevity. - • **Tailored Alloy Protection for Every Water Type:** Choose from Zinc, Aluminum, or Magnesium alloys to match saltwater, brackish, or freshwater environments perfectly. - • **Trusted by Sailing Pros and Boating Enthusiasts:** Ranked #12 in Sailing Hardware with a stellar 4.6-star rating—join the community safeguarding their boats with Martyr. - • **Maximize Vessel Lifespan with Low-Cost Cathodic Protection:** Protect your investment by preventing corrosion on iron, steel, aluminum, and magnesium components. ## Overview Martyr Anodes CMR03AL is a premium aluminum sacrificial anode designed for rudder and trim tab corrosion protection in brackish and saltwater environments. Manufactured with ISO 9001 precision diecasting, it offers tailored alloy options and easy installation with an Allen screw, ensuring maximum durability and cost-effective cathodic protection for marine vessels. ## Description Product description ## Features - High-quality Martyr anodes are pressure diecast and manufactured to strict quality standards through an ISO 9001 Quality Management System - Martyr anodes offer maximum protection by maintaining quality alloys, free from impurities like iron, which can compromise performance - Three alloys available - Use Zinc (Martyr I) for salt water, Aluminum (Martyr II) for brackish water, or Magnesium (Martyr III) in fresh water. - Use alternative anode alloys when changing water conditions - Provides low cost cathodic protection of ocean-going vessels, structures and equipment constructed of iron, steel, aluminum, magnesium, and other metals ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003E1UHOQ | | Best Sellers Rank | #109,038 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #22 in Sailing Hardware | | Brand | MARTYR | | Color | silver | | Compatible Groove Diameter | 3.75 Inches | | Customer Reviews | 4.6 out of 5 stars 155 Reviews | | Drive System | "" | | Exterior Finish | Zinc | | Fastener Size | 5/16'' x 1-1/2'' | | Fastener Type | Screw | | Finish Types | Uncoated | | Global Trade Identification Number | 00628309127855 | | Head Style | Trim | | Head Type | Flat | | Included Components | Aluminum Rudder / Trim Tab Anode with Allen Screw | | Item Diameter | 3.75 Inches | | Item Dimensions | 11.63 x 7 x 5 inches | | Item Weight | 0.56 Pounds | | Item dimensions L x W x H | 11.63 x 7 x 5 inches | | Manufacturer | Martyr | | Material | Aluminum | | Material Type | Aluminum | | Maximum Shear Strength | 2,700 psi | | Metal Type | Aluminum | | Model | CMR03AL | | Number Of Items | 1 | | Number of Pieces | 1 | | Part Number | CMR03AL | | Point Style | Hex Point | | Screw Head Style | Trim | | Screw Point Style | Hex Point | | Set Screw Thread Type | UNC or UNF | | Size Name | 0.5" x 3.75" x 0.34" | | Thread Class | 2A | | Thread Coverage | "" | | Thread Size | "" | | Thread Style | "" | | Thread Type | Unc Or Unf | | UPC | 628309127855 | | Unit Count | 1.0 Count | | Warranty Description | 90 days | ## Product Details - **Exterior Finish:** Zinc - **Head Style:** Trim - **Item dimensions L x W x H:** 11.63 x 7 x 5 inches - **Material:** Alloy Steel, Aluminum, Iron, Zinc - **Thread Size:** "" ## Images ![Martyr Anodes, CMR03AL, Aluminum Rudder & Trim Tab Anode with Allen Screw – Marine Boat Sacrificial Anode for Saltwater & Brackish Corrosion Protection - Image 1](https://m.media-amazon.com/images/I/81EgL799fAL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by J***S on August 11, 2025* ### ⭐⭐⭐⭐⭐ Review *by N***K on July 5, 2025* ### ⭐⭐⭐⭐⭐ Review *by K***C on April 25, 2025* ## Frequently Bought Together - Martyr CMR03AL Aluminum Rudder/Trim Tab Anode with Allen Screw - Martyr CMDIVERA, Aluminum Alloy Pleasurecraft Divers Dream Slotted Bolt-on - Martyr Anodes, Streamlined Shaft Anodes with Stainless Steel Slotted Head --- ## 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.vn/products/90981032-martyr-anodes-cmr03al-aluminum-rudder-and-trim-tab-anode-allen](https://www.desertcart.vn/products/90981032-martyr-anodes-cmr03al-aluminum-rudder-and-trim-tab-anode-allen) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-21*