Adjustable Air Deflector - You don't have to measure to be exact as 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 deflector is the product you need. 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 sure it is made of metal that allows a magnet to be attached. Classic Brown Design - The 4 pack of floor vent deflector is made of thick brown plastic, classic and durable, can be widely used in living room, bedroom, study, office floor vents, side wall vents, ceiling vents Improve Comfort - The air deflector helps keep the room at a good temperature while diverting the air from the bed. It has improved sleeping. These heat/AC plastic shields also to keep heat from blowing on plants Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:brown Material:plastic Package Contents: 4 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.