You only should check out the vent to make sure it is made of metal that allows a magnet to be attached. If your vent cover is not metal, it is recommended to order 4 storage tapes. Adjust it to size and on. Powerful Magnets - The magnets are strong and the sliding design makes it very easy to the magnets contact with the metal registers, around the side screws. It holds on well to the vents and redirects the air where you want it. Adjustable Deflector - You don't have to measure to be exact as air vent deflector is a unit that can extends from 8 inches to 14 inches. If you don't want air blowing directly on you, then this air vent deflector is the product you need. Classic Clear Design - The floor vent deflector is made of thick transparent plastic to achieve stealth effect, classic and , can be widely used in living room, bedroom, study, floor vents, side wall vents, ceiling vents. Put in the vent not feel abrupt Improve Comfort - The deflector helps keep the room at a good temperature while diverting the from the bed. It has improved sleeping. These heat/AC plastic also to keep heat from blowing on plants, Weight: 0.9259415004 pounds, Manufacturer: Prterver