FINDMAG Strong Magnetic Vent Cover, 8 Pack 5.5" x 12" Vent Covers for Home Ceiling and Air Registers, Durable and Reusable Wall Vents Covers for Home HVAC Systems, with Heater Deflector Function Planning Boards 65 foot (20m) durable nylon

65 foot (20m) durable nylon rope and 242 Threadlocker

Magnets Diameter = 3

Triple-Layer Anti-Corrosion Coating: Finished with black epoxy

and a protective case

it'll pull up to 1500 lbs from under water

FINDMAG Strong Magnetic Vent Cover, 8 Pack 5.5" x 12" Vent Covers for Home Ceiling and Air Registers, Durable and Reusable Wall Vents Covers for Home HVAC Systems, with Heater Deflector Function Planning Boards 65 foot (20m) durable nylonEasy Installation & Strong Magnetic Seal: Our magnetic vent covers attach easily to any flat steel vent surfaceno tools or tape required. The strong magnet seals tightly to stop unwanted airflow and energy loss, keeping your home warm in winter and cool in summer with improved HVAC performance. Customizable Standard Size: Each vent cover measures 5. 5 12 inches, fitting most ceiling vent covers, wall vents covers, and magnetic vent covers for floor.