Aluminium Shaft Anode
Aluminium/Indium alloy is more active so it gives better protection.
Essential for Mercury sterndrives - Zinc will not provide the correct protection.
Recommended for both salt and freshwater on Mercury sterndrives.
Last up to 50% longer than zinc anode.
Aluminum anodes 'self clean' in freshwater - Zinc anodes form a coating that stops them working within a few months.
Mounting hardware included