Please note that you will need one
anode for each propeller.
2 needed for 10 hp Bowthruster.
Change at least every 6-month. But please note that in some "hot" marinas it can be necessary to change the anode more frequently.
Each Anode include 1 screw for Anode.
10 hp Bowthruster with Non Composit/Bronze Propellers where installed until approx year 2000.