Corrosion Grenade Sacrificial Anode 5/8 NOTE - Sized Based on OD = Outside Diameter of Tubing , WEIGHT USED FOR SHIPPING ESTIMATE ONLY Fasten a new CORROSION GRENADE to the suction line of any air conditioner. It inhibits the corrosion of the aluminum fins , It protects continuously, even in hostile salt air environments. Works like magic  but its science! The CORROSION GRENADE takes minutes to install and provides years of protection. Replaces / Supersedes: Martyr Boat Zincs , ACZ-5/8 , ACZ5/8 , A/C ZINCS , CAMP and others