Lockdown Dehumidifier Rod 18" Long (Protects 200 Cubic Feet) 110v Black

From MidwayUSA

The Lockdown Dehumidifier Rod works by slightly increasing and maintaining the air temperature inside the gun safe or other enclosure. This allows the warm air to circulate through the safe on a continual basis, this eliminating humidity, mildew, and condensation. All of which are dangerous to your expensive firearm collection. Includes easy install quick plug attachment to help reach external power supplies.Features12 Watt easy install rodIncluded mounting bracketsDries approximately 100 Cubic ft