Magnetic Vent Covers (3-Pack) Pockets for Complete Seal 5.5" X 12" Brown

BOOST air to the rooms you need it BLOCK air in unoccupied rooms NO AIR GAPS- The only cover that conforms to the vent damper creating a COMPLETE SEAL For STEEL Vent faces sized 5.5 to 5.75 wide & 11.5 to 12 long. Please measure before ordering *Save Money by shutting off air flow to unused rooms *Keep your little ones' fingers from getting caught between the vent grille *Keep harmful dust/debris out during your demo/remodel *Improve duct cleaning by providing a stronger negative pressure