Aluminum anodes ‰ÛÔ For use in saltwater or freshwater. This is a complete anode kit to replace all factory installed anodes found on the transom and gearcase. Fasteners are included. Fits Mercury/Mariner: 135‰ÛÔ200HP 4 cylinder Verado, 75‰ÛÔ115 (1.5L) and 135‰ÛÔ250HP (2.5L and 3.0L) Optimax engines.