Magnesium Martyr anode protects inboard boat’s prop shaft from corrosion in fresh water lakes and rivers.

2 3/4 in. Magnesium Streamlined Shaft Anode | Canada Metals CMX12M

• Streamlined inboard propeller shaft anode
• Designed to mount to 2 3/4 in. diameter prop shaft to protect from the corrosive effects of stray current
• Magnesium anode is for use in fresh water applications
• Martyr anodes are made of a high purity specialized alloy based on the US Mil Spec
• Anode secures to prop shaft with 2 interlocking halves and allen head bolts with bolt retaining washers
• 2 3/4 in. inside diameter
• 4 7/8 in. outside diameter
• 3 5/8 in. length