Protect your OMC Cobra sterndrive with premium aluminium anode kits. These kits replace OMC part numbers 984513, 393023 & 431708 and perform at least 5% better than traditional zinc anodes. Aluminium is environmentally friendly, 50% lighter than zinc, and provides long-lasting corrosion protection in salt and brackish water. Each kit comes complete with all fastening hardware and installation instructions for easy fitting.