Sierra 18-6024A Anode Aluminum
Sierra 18-6024A Anode Aluminum, Sierra 18-6024A OMC Aluminum Gearcase AnodeMaterial: AluminumFor use on gearcases.Interchangeable with: GLM; 12776; Johnson/Evinrude Outboard; 393023; 436745; OMC Stern Drive; 393023; Tecnoseal; 00907AL; Zinc is for saltwater onlyMagnesium is for freshwaterAluminum is for brackish water or if the boat is used in both salt and freshwater