{"product_id":"martyr-cmt20-zinc-teardrop-hull-anode-3-4x1-8x0-6-194-cmt20","title":"Martyr CMT20 Zinc Teardrop Hull Anode – 3.4\" x 1.8\" x 0.6\" | Bolt-On | Saltwater","description":"\u003ch2\u003eMartyr CMT20 Zinc Teardrop Hull Anode\u003c\/h2\u003e\n\u003cp\u003eA compact zinc teardrop hull anode designed for bolt-on installation on hulls, keels, rudders, and other underwater surfaces in saltwater. The teardrop profile offers a low-drag, hydrodynamic shape that minimizes water resistance while providing reliable sacrificial protection against galvanic corrosion.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSteel, aluminum, and fiberglass hulls in saltwater\u003c\/li\u003e\n\u003cli\u003eRudder faces, keel leading edges, and flat underwater surfaces\u003c\/li\u003e\n\u003cli\u003eInboard and outboard vessels requiring compact hull protection\u003c\/li\u003e\n\u003cli\u003eAny application requiring a small-format teardrop bolt-on zinc anode\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e CMT20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 194-CMT20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Military-grade zinc alloy (sacrificial)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 3.4\"L × 1.8\"W × 0.6\"H (approx. 86mm × 46mm × 15mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Teardrop \/ hydrodynamic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Saltwater\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e ~120 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAlloy Selection Guide\u003c\/h3\u003e\n\u003cp\u003eTeardrop hull anodes are available in three alloys for different water types:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZinc\u003c\/strong\u003e – saltwater (open ocean, consistent high salinity) – \u003cstrong\u003eCMT20 (this product)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum\u003c\/strong\u003e – saltwater \u0026amp; brackish water (coastal, estuaries, mixed salinity)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnesium\u003c\/strong\u003e – freshwater only (lakes, rivers, reservoirs)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Hull Anodes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/martyr-zinc-teardrop-hull-anode-3-1-2x1-3-4in-cmt-t20\"\u003eMartyr CMT-T20 Zinc Teardrop Hull Anode – 3-1\/2\" × 1-3\/4\"\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/martyr-zinc-teardrop-hull-anode-5-1-4x2in-cmt-t21\"\u003eMartyr CMT-T21 Zinc Teardrop Hull Anode – 5-1\/4\" × 2\"\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/11062241067044\"\u003eMartyr CMMZC406 Zinc Hull Plate Anode – 4.4\" × 9\"\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/11062238019620\"\u003eMartyr CMDIVERHZ Heavy Hull Plate Anode – Zinc 1\" × 6\" × 12\"\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/11062238216228\"\u003eMartyr CMDIVERZ Zinc Diver’s Dream Hull Anode – ½\" × 6\" × 12\"\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003eThe CMT20 is a compact teardrop anode well suited for smaller vessels, rudder faces, and supplemental hull protection where a full plate anode would be oversized. The teardrop shape is preferred over flat plate anodes in areas with water flow — it sheds water cleanly and creates less drag than a flat profile of equivalent mass.\u003c\/p\u003e\n\u003cp\u003eZinc is the correct alloy for full saltwater use. If your vessel operates in brackish or mixed-salinity water, an aluminum teardrop anode is the better choice — zinc can passivate in lower-salinity conditions and lose effectiveness. For freshwater, magnesium is the only alloy that provides meaningful protection.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":50999092019236,"sku":"194-CMT20","price":9.19,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/194-CMT20.jpg?v=1782799305","url":"https:\/\/marisolmarine.com\/products\/martyr-cmt20-zinc-teardrop-hull-anode-3-4x1-8x0-6-194-cmt20","provider":"Marisol Marine Company","version":"1.0","type":"link"}