Zinc is the preferred material for sacrificial anodes to achieve optimal cathodic protection in saltwater environments.
• Fits models SP30S, SP35S, SP40S, SE30, SE40 SE30, SE40, SE50
• Easy installation above or below water
• Stainless steel insert for longer life and improved bonding
• Mounting Screw with Plastic Washer included
• Made in USA by Sea Shield Marine