Zinc anode for Max Prop ø63mm Anode for Max-Prop propellers. Features : *Diameter: 65 mm *Outside diameter: 61 mm *Axis: 39 mm *Height: 42 mm *Model: Max 1 *Weight: 0.278 kg The anode is a device that protects important metal equipment in contact with water from corrosion. This is known as a sacrificial anode. Anodes need to be cleaned and replaced regularly, as they are no longer effective after 60% wear. In salt water, choose zinc alloy or aluminium alloy anodes. Aluminium has the advantage of being lighter and less polluting. In freshwater, choose magnesium anodes.