--- product_id: 12921025 title: "Anodes, CMR03, Zinc Rudder & Trim Tab Disc Anode with Stainless Steel Allen Head (0.5 H x 3.75 OD x 0.34 ID) – Marine Boat Sacrificial Anode for Saltwater Corrosion Protection" brand: "martyr" price: "₨948" currency: SCR in_stock: true url: https://www.desertcart.sc/products/12921025-anodes-cmr03-zinc-rudder-and-trim-tab-disc-anode-stainless store_origin: SC region: Seychelles --- # Zinc alloy for superior saltwater protection Precision stainless steel Allen head design ISO 9001 certified quality assurance Anodes, CMR03, Zinc Rudder & Trim Tab Disc Anode with Stainless Steel Allen Head (0.5 H x 3.75 OD x 0.34 ID) – Marine Boat Sacrificial Anode for Saltwater Corrosion Protection **Brand:** martyr **Price:** ₨948 **Availability:** ✅ In Stock ## Summary > 🛥️ Protect your ride, own the tide! ## Quick Answers - **What is this?** Anodes, CMR03, Zinc Rudder & Trim Tab Disc Anode with Stainless Steel Allen Head (0.5 H x 3.75 OD x 0.34 ID) – Marine Boat Sacrificial Anode for Saltwater Corrosion Protection by martyr - **How much does it cost?** ₨948 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/12921025-anodes-cmr03-zinc-rudder-and-trim-tab-disc-anode-stainless) ## 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 - • **Compact Yet Mighty:** Sized perfectly at 0.5 H x 3.75 OD x 0.34 inches to fit seamlessly on rudder and trim tabs, delivering maximum protection in minimal space. - • **Effortless Installation:** Stainless steel Allen head and slotted drive system designed for quick, secure mounting—no hassle, no downtime. - • **Ultimate Saltwater Defense:** Zinc alloy engineered to resist corrosion in harsh marine environments, keeping your vessel safe and sound. - • **Certified Quality, Zero Compromise:** Manufactured under strict ISO 9001 standards to ensure peak performance and durability every time. - • **Cost-Effective Cathodic Protection:** Protects iron, steel, aluminum, and magnesium components without breaking the bank—smart maintenance for savvy boaters. ## Overview Martyr Anodes CMR03 is a premium zinc alloy anode designed for saltwater use, providing reliable cathodic protection for marine vessels. Manufactured with ISO 9001 quality standards and featuring a stainless steel Allen head for easy installation, this compact anode safeguards metal components like iron, steel, aluminum, and magnesium from corrosion, ensuring longevity and performance in demanding ocean environments. ## Description Full description not available ## Features - Zinc alloy for use in saltwater - Martyr Anodes offer maximum protection by maintaining quality alloys, free from impurities like iron, which can compromise performance - Provides low cost cathodic protection of ocean-going vessels, structures and equipment constructed of iron, steel, aluminum, magnesium, and other metals - High-quality Martyr anodes are pressure diecast and manufactured to strict quality standards through an ISO 9001 Quality Management System - 0 ## Technical Specifications | Specification | Value | |---------------|-------| | Material | Zinc | | Drive System | Slotted | | Head Style | Trim | | Exterior Finish | Aluminum,Stainless Steel,Steel,Zinc | | Thread Size | Unthreaded | | Point Style | Hex | | Metal Type | Zinc | | Brand | Martyr Anodes | | Color | magnesium | | Head Type | Hex | | Item Weight | 0.72 Kilograms | | Thread Type | Standard | | Thread Coverage | Partially Threaded | | Thread Style | Right Hand | | Thread Class | 2A | | Fastener Size | .5 inches | | Size | .5 H x 3.75 OD x .34 | | Item Diameter | 0.5 Inches | | Compatible groove diameter | 2 Inches | | Number of Pieces | 1 | | UPC | 628309103545 | | Global Trade Identification Number | 00628309103545 | | Item Package Dimensions L x W x H | 9.29 x 6.54 x 2.32 inches | | Package Weight | 0.74 Kilograms | | Item Dimensions LxWxH | 3.9 x 3.8 x 1.6 inches | | Brand Name | Martyr Anodes | | Number of Items | 1 | | Manufacturer | Martyr | | Part Number | CMR03 | | Style | Zinc | | Sport Type | Boating | ## Product Details - **Material:** Zinc - **Head Style:** Trim - **Item dimensions L x W x H:** 3.9 x 3.8 x 1.6 inches - **Exterior Finish:** Aluminum,Stainless Steel,Steel,Zinc - **Thread Size:** Unthreaded ## Images ![Anodes, CMR03, Zinc Rudder & Trim Tab Disc Anode with Stainless Steel Allen Head (0.5 H x 3.75 OD x 0.34 ID) – Marine Boat Sacrificial Anode for Saltwater Corrosion Protection - Image 1](https://m.media-amazon.com/images/I/81OdKriMNQL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Is this a pancake anode? Does it have the top and the bottom anode?** A: I ordered two not being sure what the configuration was. These are pancake anodes - flat on one side and domed on the other. They apparently come in pairs where a QTY of 1 gets you two anodes connected together with a screw that can be easily separated to expose the flat side. I received two pairs with a QTY of 2. **Q: The listing says this is for a cmr 5, but the picture shows a cmr 3. which is it?** A: It is a CMR5. It is 5" in diameter and 3/4" thick. I put them on my Bennett trim tabs, replacing the old original factory anodes. Fit perfectly. **Q: Will this work to prevent galvanic corrosion between steel and aluminum that is not in the water?** A: I don’t believe it will **Q: How many pieces come with an order, 2?** A: Yes. 2. ## Frequently Bought Together - Martyr CMR Rudder/Trim Tab Anodes - Martyr Anodes, Streamlined Shaft Anodes with Stainless Steel Slotted Head - Martyr CMDIVERA, Aluminum Alloy Pleasurecraft Divers Dream Slotted Bolt-on --- ## 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.sc/products/12921025-anodes-cmr03-zinc-rudder-and-trim-tab-disc-anode-stainless](https://www.desertcart.sc/products/12921025-anodes-cmr03-zinc-rudder-and-trim-tab-disc-anode-stainless) --- *Product available on Desertcart Seychelles* *Store origin: SC* *Last updated: 2026-04-22*