This size fits standard duct opening of 6"x 10" FACEPLATE SPECIFICATIONS: Metal Type: Sand Cast Aluminum Metal Face Plate Overall size: 7-1/2" x 11-3/4" Face Plate Thickness: 1/4" DAMPER /LOUVER SPECIFICATIONS: Material: Metal Metal Type: Steel Finish: Black/ White Powder Coated Industrial Design Patent Pending 196854 HANDMADE BY SKILLED ARTISANS: Freshen up the look of your home with the stylish and attractive Achteck design 6"x 10" vent cover hand-made by skilled artisans. RUST FREE METAL: The faceplate is rust-free and long-lasting. It is powder-coated in Fine Grain Matte Finish which is easy to clean with a soft brush and maybe repainted with metal spray paint as per the color of your choice LOUVERS / DAMPERS: The grills are supplied with removable & adjustable metal louver having horizontal parallel slats/fins/blades which can be opened or closed manually with the help of a lever provided on one side of the vent to control the airflow from the air duct.