Return Air Filter Grille; Type Return Air; Style Eggcrate, Hinged Face; Grill Size 20 Inch Width x 20 Inch Height; Overall Dimensions 23-3/4 Inch Length x 23-3/4 Inch Width; Fin Spacing 1/2 Inch x 1/2 Inch x 1/2 Inch; Material Extruded Aluminum; Finish/Color White Enamel/Mill; Inclusions/Features Flush Mount with T-Bar Ceiling