3/8 in, Taper Zinc Cap Anode 2-1/2 oz

Corrosion Is Expensive, Protect Your Investment! A Common Sense Approach To Corrosion Control. Save Downtime And High Repair Cost. After being submerged in concentrated salt water for 5,000 hours, the unprotected iron T-Bolt on the left is totally corroded and unusable. The MARS Zinc Cap protected T-Bolt on the right remains in its original condition!