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From Idaho, USA.
- BOOST air to the rooms you need it
- BLOCK air in unoccupied rooms
- SAVE MONEY- heat and cool only the rooms you use
- NO AIR GAPS- The only cover that conforms to the vent damper creating a COMPLETE SEAL
- WARNING Not all metal vents are magnetic. Not for aluminum/high vents. See listing pic 5 for details
- Item#863