Mercruiser Magnesium Nut Anode For Alpha I Replaces 55989M
Magnesium Anode For Mercuiser Magnesium Nut Anode For Alpha I Gen I And MR Drives Replaces 55989M
Diameter: 1-1/4"
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US Military Grade Magnesium Anode. Magnesium is for Freshwater Use!