Aluminium for use with both salt water for all Alpha One Gen II 91 onwards until now complete set of anode aluminium for Merc Cruiser Alpha One Gen II with disc anode and screw set fits Alpha One Gen II (1991 and newer S/N OD469829 and up) This part will supersede to p/n 888756Q03 either part may be dispatched supersedes: P/N 888756Q01 Contents of the kit: set of 2 806189Q1 1 821631Q1 1 821629Q1 1 806105Q1 1 76214Q5