This Navalloy anode Kit contains the following aluminum anodes (for use in salt or fresh water):
Cavitation Plate anode 00046A
2 Drive Trim Cylinder anodes 00047A
Trim Tab Flat anode 00049A
Bearing Carrier anode 00048A
screws and hardware
These premium quality
Navalloy Anodes are specially made to be effective in all types of water: salt, brackish and fresh. Read about these anodes here
Zinc anodes are not recommended for Mercruiser outdrives.