Lewmar 589150 Thruster Anode Kit Martyr CM589150KIT (Aluminum, Zinc & Magnesium Options)

Lewmar 589150 Thruster Anode Kit Martyr CM589150KIT Suits Lewmar thrusters: 140mm tunnel thruster Kit includes: 1 x 589150 thruster anode (CM589150) 1 x fastening hardware & instructions Anode material options: Aluminum (for use in salt and brackish water) Zinc (for use in saltwater)  Magnesium (for use in freshwater) Why aluminum instead of zinc for salt and brackish water? Performs at least 5% better than traditional zinc anodes in salt water; Protects 50% longer than traditional zinc anodes;  Aluminum is environmentally friendly - it contains 0% Cadmium, a toxic material found in traditional zinc anodes;  Meets the US Military Specification MIL-DTL 24779C(SH); Weighs 50% less than traditional zinc anodes; Are the only anodes proven to be effective in Salt & Brackish water Easy installation