The only anodes with a wear indicator.
Performance Metals Aluminium Anodes feature patent pending 'Wear Indicator' which tells the boater when it is time to change. This plastic indicator is embedded in the anode and appears in the surface of the anode when it appears.
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.
Attractively packaged with clear information to aid with selection and installation.
Alloy meets meets military specification MIL-A-24779 (SH).