Fits Mercruiser Alpha 1 Gen 2 Outdrive Includes Hardware US Military Grade Magnesium Kit Replaces Quicksilver 888755Q03, Martyr CMALPHAKITM, Seachoice 95031, Sierra 18-6158, Tecnoseal 20801MG. This Is A US Military Grade Magnesium Anode Kit Made To The Highest Quality. Magnesium Is For Freshwater Use.