Different outboard anode materials are used depending on whether it's in freshwater, brackish water or salt water, Zinc is less aggressive, so it's perfect for saltwater with a slower dissolve rate
Package Include: 1 pc Zinc Trim Tab Anode 67F-45371-00-00, 1 pc Bolt
The Boat Outboard Engine Zinc Trim Tab Anode Functions as a Cathodic Protection Device for Outboard Engines, Sacrificially Corroding to Absorb Electrochemical Corrosion from Seawater, Thus Safeguarding Metal Components and Enhancing Engine Lifespan and Performance