12" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 22 5/8"] w25h25 border: none

border: none

+ Product Details Size - 22"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 22"w X 14"h is the size for the duct opening measurement only

And is classified as Class 1 Fire Proof - B1

3/4" - 2981 PSI

12" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 22 5/8"] w25h25 border: none+ Product Details Size 12"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 22 5 8" height Actual Filter Size 11 3 4"w x 19 3 4" x 1" High quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter