30" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES White + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 18"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 36"w X 22"h is the size for the duct opening measurement only

+ Product Description Upgrade your HVAC system with our 8" Round Air Vent Supply Grille

actual front end outer dimensions are approximately 26 5/8" width X 8 5/8" height

actual front end outer dimensions are approximately 26 5/8" width X 16 5/8" height

30" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIR FLOW LINEAR BAR GRILLES White + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 18"w X 32"h is the size for the duct opening measurement only + Product Details Size 36"w X 22"h is the size for the duct opening measurement only