Product Description C-9 sacrificial zinc donut anode. For use in salt water. Mounts with included steel hardware. Shaft diameter: 2". Overall dimensions: 4" X 1-3/8". Weight: 2.79 lbs. Maxine General Zinc Anode LC 2" C-9 at Fishermans Marine $22.99 Buy Now Check Price on Amazon Check Price on eBay