Duff Mercruiser Bravo 3 Magnesium Anode Kit | 4BoatsMagnesium anode kit to protect Mercruiser Mercury Bravo 3 (2004+) stern drive systems from galvanic corrosion; includes all replacement anodes and a fixing kit for straightforward fitting. Fits Mercury Mercruiser Bravo 3 stern drive (2004+) Engine kit includes: CM762144Z x1, CM76215Z x1, CM806190Z x2, CM821630C2Z x1, CM865182Z x1, Fixing Kit x1 Magnesium alloy ideal for freshwater and many brackish conditions Direct replacement anodes to maintain