ZD77 - Zinc Pear Anode.

This MG Duff zinc bolt on hull pear anode, is for saltwater use only and is supplied with the appropriate backing pads.

The backing pads are designed to stop the back of the anode from wasting away, and possibly causing the anode fixings to come loose.

It also provides a barrier to help protect GRP hulls from alkalinity that can be produced as part of the cathodic protection process.