Martyr Zinc Engine Anode - Combination - 1/8" NPTPart No. 191128 External Thread Size - 1/8” NPTOverall Length - 64mmZinc Diameter - 6mmPlug Head Diameter - 11mmMartyr Zinc Engine Anode - Combination - 1/8" NPT - 191128$18.33PriceGST IncludedQuantity*Add to CartBuy NowNotePrices online and in-store may differ.