01081Lewmar 185 Bow Thruster Zinc Disc Anode Tecnoseal Lewmar Bow Thruster Zinc Anode 589350 for salt water use – 185mm diameter tunnel. Sold individually. Original part number 589350 for 185TT. Diameter 45mm. The Tecnoseal Lewmar 185 Bow Thruster Zinc Disc Anode, part number 01081, is designed for corrosion protection in marine environments. This zinc anode is specifically engineered for use with Lewmar 185 Bow Thrusters that feature a 185mm diameter tunnel. Its primary function is to mitigate galva