Sierra 18-6025 Zinc Anode Sierra replacement zinc anode. Zinc is recommended for saltwater applications only. For use on Stern bracket Interchangeable with CMP CM398331Z GLM 12736 JohnsonEvinrude Outboard 398331 433458 Tecnoseal 00910 California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Engine Parts Wiser Yes Product MPN 18-6025 Product UPC 030999563965