Ideal Fit Size: The size of the floor register is 4x10 inch which fits most standard air ducts opening sizes. Also,the dimension size provided in the specs for this vent covers refers to the size of your duct opening. Measure the height and width of the opening to find the perfect floor grille size. Easy to Install: Installing this floor vent covers is a breeze thing, no tools required, just drop it into vent. You can enjoy a quick and straightforward setup to enhance the ventilation of your home. Classic Design: Our register vent cover is a classic louver design, with adjustable air supply lever, you can easily open the latch with a finger move.Clean lines and thoughtful design ensure air circulation is efficient and consistent. Superior Quality Material: Our floor register crafted from high quality steel with durable powder paint coated, with high robustness and long-lasting performance. Heavy duty floor vent cover to allow walk on use. Widely Used: This air vent covers widely used for floor vents, sidewall, ceiling registers. And It can be used all around the home , office, work place, super market, etc. Available in a variety of styles and finishes to match any decor. VOISEN Floor Register, 4" x 10" Floor Vents, Steel Adjustable Air Supply Grille Register Vent Cover Grill for Sidewall and Floor(Black) Ideal Fit Size: The size of the floor register is 4x10 inch which fits most standard air ducts opening sizes. Also,the dimension size provided in the specs for this vent covers refers to the size of your duct opening. Measure the height and width of the opening to find the perfect floor grille size. Easy to Install: Installing this floor vent covers is a breeze thing, no tools required, just drop it into vent. You can enjoy a quick and straightforward setup to enhance the ventilation of your home. Classic Design: Our register vent cover is a classic louver design, with adjustable air supply lever, you can easily open the latch with a finger move.Clean lines and thoughtful design ensure air circulation is efficient and consistent. Superior Quality Material: Our floor register crafted from high quality steel with durable powder paint coated, with high robustness and long-lasting performance. Heavy duty floor vent cover to allow walk on use. Widely Used: This air vent covers widely used for floor vents, sidewall, ceiling registers. And It can be used all around the home , office, work place, super market, etc. Available in a variety of styles and finishes to match any decor.