Unique Home Designs 30 in. x 30 in. White Steel Pet Grille ISPA800030WHT - The Home Depot

Many homes require open heating ducts to transfer and moderate airflow. For older homes missing the cast iron Grilles and Registers or new construction with a traditional style, these pieces are made of the same materials as the originals. Choose the open Grille, for a constant flow, or the Register, which is backed with louvers that can be opened and closed. Both are made from cast iron and finished in Matte Black