<b>If you need to cover your floor/wall/ceiling vent register and don’t want to use thin paper, look no further than 1.2mm Double Thickness Magnetic Vent Cover of 3-pack.</b> <p><b>Compatible with all types material registers</b></br> The special advantage of our stronger magnetic air vent cover is that traceless magnetic stripes are offered to make vent cover compatible with all material vent registers while others can only be used on steel materials. <p><b>Strong magnetism and powerful adsorptive force</b></br> Compared with general thin covers, these magnetic vent covers use double thickness magnet to generate enough( twice) attractive force to adhere the register. Meanwhile, moderate thickness makes sure it doesn't fall off due to heavy weight. Great for ceiling and wall too. <p><b>Versatile Application</b></br> Two size (7.8''*15.7''/5.5''*12.2'') for your choice, great for various vent covers, such as heating, HVAC, air conditioning, RV, fireplace, furnace etc. The covers are also easily trimmed to fit and maintain flexibility to follow the contours of the vent. <p>Merya Magnetic Vent Covers-Your Right Hand for Air Cover</br> Take them home now to control the airflow to keep your home warm or cool according to your need.