Speedi-Grille SG-246 RAG 24-Inch by 6-Inch White Return Air Vent Grille with Fixed Blades Speedi-Grille is made in the USA Stamped 1/2-Inch fan shaped louvers Louvers are parallel to longest side Solid steel construction;Fits Nominal Opening" 24-Inch by 6-Inch Soft white paintable powder coat finish