Magnesium Anode Kit Fits Mercruiser Bravo 1 Outdrives Includes Hardware US Military Grade Anode Kit Replaces Quicksilver 888757Q02, Martyr CMBRAVO1KITM, Seachoice 95051, Sierra 18-6159, Tecnoseal 20803MG. This Is A US Military Grade Magnesium Anode Kit Made To The Highest Quality. Magnesium Is For Freshwater Use.