12" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 14 5/8"] Color_Black + Why Hvac Premium HVAC 4 X 12 Is CRFG2028 Width_14in

+ Why Hvac Premium HVAC Premium has been providing superior quality service for many years

+ Product Details Size – 30"w X 12"h is the size for the duct opening measurement only

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+ Product Details Size - 34"w X 16"h is the size for the duct opening measurement only

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

12" X 12" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 14 5 8" X 14 5 8"] Color_Black + Why Hvac Premium HVAC 4 X 12 Is CRFG2028 Width_14in + Why Hvac Premium HVAC Premium has been providing superior quality service for many years + Product Details Size – 30"w X 12"h is the size for the duct opening measurement only