Zerust ActivDri FAD12-1 combines a silica-gel desiccant with vapor corrosion inhibitor (VCI) technology in one capsule to control humidity and protect metals and electronics inside sealed enclosures. The desiccant adsorbs moisture while the VCI emits invisible, odorless, non-toxic molecules that settle onto exposed metal and dissipate on removal, leaving no residue. A durable coated steel cable allows insertion and retrieval. Protects ferrous metals up to 177 ft³ for up to 1 year; also protects aluminum and yellow metals (copper and brass) when used as instructed. Supplied as a case of 10. Zerust part number 375-F-00003.