Duct opening size 6" x 12"(7-1/4" x 13-1/2" Overall)
Made of heavy-duty solid cast brass for durability.
Finished with a durable oil rubbed bronze powder coat finish to resist rust.
Louver control extension from register 5/8" which could control air flow easily by foot.
To determine size needed, measure air duct opening rather than old register or grille.