Super Magnetic: What good is a magnetic vent cover if it falls off every two seconds? Whether it's a weak magnet, a rigid profile, or the vents are spray-painted, some vent covers just won't stick. Suitable for ceiling, wall, and vents. Can be easily cut to fit your exhaust duct. No need to worry that the predetermined size cover won't even fit. We use PET materials to make more environmentally friendly products. Rounded corners are cut to prevent puncture injuries and make your use easier. The magnetic vent cover has an additional protective film, which can make the product whiter and more beautiful. If you use it on the air vent, you don't have to worry about exhaust dust falling in, and you can also adjust the ventilation volume of the room. The magnetic air vent cover is made of super strong magnetic material, with a magnetism of 600 Gauss. No matter how much air is in, it will not affect the use of the vent cover and ensure that it will not fall off. Size: 20 x 39 x 1.5 cm