14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Wood + Product Details Perfect Fit 4 X 12 Is CRFG2028 Width_14in

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 36" OR 36" X 16" duct opening (measured at the opening)

+ Product Details Size - 14"w X 28"h is the size for the duct opening measurement only

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+ Product Details Size - 16"w X 24"h is the size for the duct opening measurement only

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14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Wood + Product Details Perfect Fit 4 X 12 Is CRFG2028 Width_14in + Product Details Perfect Fit & Easy Sizing Designed for a 16" x 36" OR 36" X 16" duct opening (measured at the opening) + Product Details Size 14"w X 28"h is the size for the duct opening measurement only