Alpha I, 1991-Present, Magnesium Anodes

Protect propellers, shafts, engines and rudders. 

Complete anode kits for your specific application. Offered in Zinc, Aluminum or Magnesium alloys.

Key Features 

• Complete anode kits for specific applications
• Manufactured to U.S. Military specifications
• Prevent galvanic corrosion
• Kits include all installation hardware  

Martyr™ III Cadmium-free Magnesium Anodes for Freshwater ONLY

Use Cadmium-free, magnesium anodes if you only use your boat in freshwater. (Zinc anodes can "passivate" and stop working in freshwater.) Magnesium anodes should not be used in any other water type. If you trailer your boat, and use it in a variety of saltwater, brackish and freshwater locations, aluminum anodes are the best all-around choice for protecting your outboard or outdrive.