Camco 11612 5/8-Inch OD by 42-Inch Flexible 3 Section Anode Rod Extends the life of your water heater 5/8-Inch OD x 42-Inch long (segmented into 3 sections for flexibility) Aluminum Prevents or deters corrosion of any metal exposed to water inside the water heater Attracts corrosion causing particles away from your water heater