Aluminum Anode Kit for Mercury Verado 4 and Mercury Optimax Outboards Replaces 8M010755, Martyr CMVERADO04KIT, Seachoice 95101, Sierra 18-6156, Tecnoseal 20814AL. This Kit Is A US Military Grade Aluminum Anode Kit Made To The Highest Quality. Kit Includes All Parts Needed For Application. Aluminum Is For Salt And Brackish Water Use.