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 Suitable for all AC 8in diameter 12125SDCLNGBX

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 12" OR 12" x 20" duct opening (measured at the opening)

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

The total outer size of this grille is the listed size plus 1

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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 Suitable for all AC 8in diameter 12125SDCLNGBX + Product Details Perfect Fit & Easy Sizing Designed for a 20" x 12" OR 12" x 20" duct opening (measured at the opening) + Product Details Size 14"w X 28"h is the size for the duct opening measurement only