Don’t let electrolysis and extreme weather climates ruin the life of your finishes. Extend the life of your aluminum metal project with our uniquely made zinc anode screws. Give that additional measure to prevent coating failure on aluminum. Our specially designed zinc anodes can extend the durable life of industrial or architectural coatings to a maximum with Dura-Life. This sacrificial rounded screw cap fits any quarter 20 hole. Use on commercial or residential metal projects like gates, railings, parts and more to prevent early onset of corrosion on aluminum in environments that are prone to corrosion like UV, salt or when using dissimilar metals. Perfect on powder coated, painted or conversion coated metal. Let Dura-Life be your protector. Sold individually.