Beneteau Type 40mm Zinc propellor cone anode.
This anode is supplied with a replacement stainless bolt.
Please note this is a Zinc anode for saltwater. An Aluminium anode should be used for brackish water use. A Magnesium version should be used for freshwater. Anodes should not be mixed on any installation.
If your anode is worn away by 33% or more, it is advisable to change it as more of its surface area has been worn away and the remaining anode will wear away much quicker.