Please note: Anodes are made out of different materials for different applications.

Zinc (Zn)
Aluminum (Al)
Magnesium (Mg)
For salt water use.
For salt & brackish water use.
For fresh water use.

Grouper Hull Anodes

Martyr's Streamlined Shaft Anodes are designed to last and are guaranteed to be manufactured to the latest US Military Allow Specification. They are tested regularly to ensure consistency. These anodes are designed to be the best in:

  • 15 ft cable
  • Do not connect to battery

Part # CMGROUPERA

  • Material: Aluminum
  • Size: 8" X 3" X 1.6"