: These home floor vent covers are made of high quality iron. Sturdy and , not easy to break or deform, strong . It is coated with rust- material to that the vent covers can adapt to any environment and have a long service life. EASY TO INSTALL: Installation can be done quickly without additional tools. Please measure the height and width of the opening before ordering. 4x10 INCH FLOOR AIR VENT: The included 3-Pack floor register features a classic louvered design that not only serves as a decorative feature in the room, but also llows air to circulate. The air vents have a clean, smooth look and the edges of the vents fit snugly into any floor to prevent risks. ADJUSTABLE AIRFLOW CONTROL: 4x 10Inch floor vents covers provide efficient and reliable airflow in living spaces. The floor vent with adjustable check valve on the back is easily adjustable; when the valve is closed, it effectively prevents conditioned air from escaping. WIDE APPLICATION: This air vent covers can be widely used for floor vents, wall vents and ceiling vents. Can be used in homes, offices, workplaces, supermarkets, etc. The modern and minimalist design is also suitable for a variety of home decor styles. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Black Material:iron Package Contents: 3 * floor register 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.