Prop Shaft Anode for Ghost Trolling MotorsThe Prop Shaft Anode is a ring-shaped fitting that is installed on the back of the propeller, replacing the propeller nut supplied from the factory. The ring-shaped fitting prevents corrosion that could result from using the trolling motor in brackish water. NOTE: Using the Ghost Trolling Motor in saltwater WILL void the warranty. | Lowrance Prop Shaft Anode for Ghost Trolling Motors