Fin anode for Honda ref. 06412-ZW5-000 Fin anode for Honda outboard motors from 25 to 50 hp in M2 aluminium alloy ref. no. 06412-ZW5-000 Martyr anodes in M2 Aluminium alloy - Protects 50% longer than traditional zinc anodes - Weigh 50% less than traditional zinc anodes - Conform to US Military Specification Mil-A-24779(SH) - They are the only anode effective in both salt and brackish water - They are Cadmium-free, a toxic material found in traditional zinc anodes, so they are more environmentally friendly. IF YOU HAVE ANY DOUBTS BEFORE PROCEEDING WITH THE PURCHASE, PLEASE SEND US A COPY OF YOUR ENGINE BOOKLET BY E-MAIL FOR CONFIRMATION OF THE SPARE PARTS, WHICH MAY VARY DEPENDING ON THE ENGINE MODEL