The zinc limited-clearance or donut collar provides cathodic guard for propeller shaft with Mil Spec anode for a tight fit to the shaft.
These zinc sacrificial anodes are high-quality pressure die-cast and provide effective and inexpensive protection for your boat. Two stainless steel slot-head screws with lock washer and hex nut are used to lock the anode halves around the shaft. The stainless steel hex nut is pressed into the anode body.
Warning: Zinc anodes are for salt and brackish water use only.
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