Home Engine Systems Engine Care Anodes Zinc Plate Hull Anode Galvotec Inc Zinc Plate Hull Anode $69.89 Zinc Plate Hull Anode quantity Add to cart Product Details Product Details Zinc Plate. (2) Cast-in Cored Holes on 6″ centers. 22 lbs. Dimensions: 6″ W x 12″ L x 1-1/4″ T.