Mercruiser Housing Plate Aluminum Anode Kit | Canada Metals CM821629KITA Martyr Housing Plate Anode Kit Mercruiser Housing Plate Aluminum Anode Kit Includes mounting screws For Mercruiser Alpha I Gen II drives from 1991 and up Use aluminum anodes in brackish and salt water applications Aluminum aftermarket direct replacement for Mercruiser 821629A1 Replaces Mercruiser 97-821629Q1