This air vent cover is designed for straightforward, tool-free installation—just drop it into the vent opening for a quick setup that boosts home ventilation. It features a classic louver design with an adjustable air supply lever, letting you adjust airflow with a simple finger movement. Crafted from high-quality steel with a rust-resistant pre-coated finish, it offers lasting strength and a clean, polished look across various indoor spaces. Sized to fit 4 x 10 in. duct openings, remember to measure your duct’s actual length and width before purchasing rather than using your existing cover’s dimensions. It works with both floor vents and sidewall vents, and suits homes, offices, workplaces, supermarkets and more to support consistent, efficient air circulation for heating, cooling and other standard HVAC systems. Color: Silver.