Godfrey Collar Zinc 4 1/2” – Propeller Shaft Marine AnodeGodfrey Premium Collar Zinc 4 1 2 is a heavy duty 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 sacrificial anodes work by sacrificing themselves to protect more valuable metal parts such as the propeller, shaft, and surrounding hardware. This process helps reduce the