26" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 28 5/8" X 18 5/8"] 8in diameter + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 16"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 5

+ Product Details Size - 25"w X 34"h is the size for the duct opening measurement only

High Quality – high quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Size - 6"w X 32"h is the size for the duct opening measurement only

26" X 16" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 28 5 8" X 18 5 8"] 8in diameter + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 16"w X 14"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 5