Volvo Penta Zinc ring anode for 110S Saildrive.Please note, that this is a Zinc anode for saltwater use. A Magnesium version should be used for freshwater. Anodes should not be mixed on any installation. Zinc anodes are being phased out and replaced by Aluminium anodes in 2022. Do not mix anode metal types 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.The anode protects the drive, engine and propeller from corrosion due to electrical currents in the water. When you change your anode, make sure that it is not painted and that it has a good contact via the bolts and metal surface to the Saildrive. Volvo Penta Part No: 875812For: 110S