Godfrey Premium Collar Zinc 2 1/4” – Marine Shaft Anode for Corrosion ProtectionGodfrey Premium Collar Zinc 2 1 4 is a high quality marine shaft anode designed to protect propeller shafts and underwater metal components from galvanic corrosion. This collar zinc installs directly onto the shaft and provides reliable protection in saltwater environments. Zinc anodes work by sacrificing themselves to prevent corrosion of critical boat components such as the propeller, shaft, and surrounding hardware. This helps reduce damage caused