Rubber Vent Cover, 4 x 10 Inch, 3-Pack, DOES NOT include metal vent, Stops Airflow (additional sizes available) Rubber vent covers, 4x10 Inch, 3 pack (Does not include metal vent) Compatible with all vent materials (metal, plastic, wood, painted) Blocks vent airflow and redirects air to other rooms to improve home comfort Use on floor, ceiling and sidewall vents Hidden from view & eliminates vent noise