General description Magnetic Air Vent Strip 4 Pack is designed to cover air grilles or floor vents in homes, RVs, HVAC units, and furnace vents. These flexible and thick magnetic vent covers can be cut to fit specific vents, ensuring a snug fit and efficient airflow management. Technical specifications Dimensions: 20.3 x 39.3 cm (15.5" x 8") Material: Double-thickness magnetic material Compatibility and accessories Works with steel vents only; not compatible with aluminum, plastic, or wood materials Usage Efficiently distribute airflow or close registers in underutilized spaces Helps reduce energy costs by preventing heating or cooling of unused areas Redirects airflow to areas where it is needed for improved comfort Other information Please test with a magnet before application Manual measurement may result in an error of 1-3 cm Color may vary due to differences in light and display