14" X 8" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 16 5/8" X 10 5/8"] Supply Grille + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 6"w X 12"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 8"h is the size for the duct opening measurement only

Crafted from solid stamped steel

Its linear bar design maximizes ventilation

+ Product Details Size - 32"w X 20"h is the size for the duct opening measurement only

14" X 8" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 16 5 8" X 10 5 8"] Supply Grille + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 6"w X 12"h is the size for the duct opening measurement only + Product Details Size – 36"w X 8"h is the size for the duct opening measurement only