About This

• IMPORTANT! - For STEEL Vents Only: Not suitable for aluminum or plastic vents. Please test with a small magnet before ordering. If your vent is made of non-steel material, please find the Bundles item "Non-Steel Vent Compatible Set" located below the "Size Name" option on this listing
• IMPORTANT! - Cover Size: 12" x 12", Thickness 60 mil (1.5 mm), rounded corners. Fits vent faces between 11.5" to 12" wide and 11.5” to 12” long. Measure your vent face before ordering. Check listing image 6 for SIZE CHART details
• Extra Magnetic Strength: Made from premium materials, these covers have a surface magnetic strength of up to 650 Gauss, ensuring a complete seal with no slipping - Setting us apart from competitors
• Airflow Control: Effectively blocks hot or cool airflow in unoccupied rooms, improving comfort and directing air where it’s needed
• Versatile Use: Ideal for HVAC systems, AC units, heater vents, and more - Perfect for homes, basements, RVs, and noise reduction in apartment buildings