High-quality Martyr anodes are pressure die-cast and manufactured to meet 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. Provide low cost, cathodic protection of ocean-going vessels, structures, and equipment constructed of iron, steel, aluminum, magnesium, and other metals. Protects ocean-going vessels and equipment Meets ISO 9001 Quality Management standards | Martyr Aluminum Anode Kit For Mercury Bravo III Engine