Adjustable Deflector - You 't have to measure to be exact as deflector is a unit that can extends from 8 inches to 14 inches. If you 't want air blowing directly on you, then this deflector is the product you need. 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 flow where you want it. You only should check out the vent to make 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. Classic Clear Design - The floor vent deflector is made of thick transparent plastic to achieve stealth effect, classic and durable, can be widely used in living room, bedroom, study, office floor vents, side wall vents, ceiling vents. Put in the vent will 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 shields also to keep heat from blowing on plants Suitable for: 22.9-35.6CM Colour:transparent Material:plastic Package Contents: 2 x Air Deflector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.