Volvo Penta Zinc SX and DP-SM cavitation anode.
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. Please note this is a Zinc anode for saltwater use.
Volvo Penta Part No: 3855411
For: DP-SM, SX up to 2007