14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_White + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 22" x 34" or 34" x 22" is the size for the duct opening measurement only

+ Product Spec Sheet Round Ceiling Diffuser Spec Sheet

+ Product Description Upgrade your HVAC system with a high-quality aluminum return grille designed for a clean

+ Product Details Size – 20"w X 4"h is the size for the duct opening measurement only

Actual Filter Size – 17 3/4"w x 15 3/4" x 1"

14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_White + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 22" x 34" or 34" x 22" is the size for the duct opening measurement only + Product Spec Sheet Round Ceiling Diffuser Spec Sheet