Martyr Anode. Prop nut. Fits Bravo III Drives. (2004- Present).
Magnesium. Fresh water only.
Martyr Anodes provides high quality, low cost marine cathodic protection for boats, marine structures, and boat equipment. Martyr is the only manufacturer that offers all three alloys that protect your boat from corrosion that can occur in salt water, brackish water, and freshwater.