Mercruiser Aluminum Trim Tab Anode Kit | Martyr CM762145KITA Martyr aluminum anode is designed to protect a gearcase from corrosion in salt or brackish water. Martyr Mercruiser Aluminum Trim Tab Anode Kit | CM762145KITA Mercruiser trim tab anode kit Includes fastening hardware Aluminum anode for use in brackish and salt water applications For Alpha I Gen II For Bravo I, II and III Aluminum aftermarket direct replacement for Mercruiser 97-76214Q5 For magnesium see p/n CM762145KITM