12" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 30 5/8"] white + Product Details Size -

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

+ Product Details Size - 30"w X 22"h is the size for the duct opening measurement only

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

1/2" - 3119 PSI

+ Product Details Size - 30"w X 28"h is the size for the duct opening measurement only

12" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 30 5/8"] white + Product Details Size -+ Product Details Size 12"w X 28"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 30 5 8" height Actual Filter Size 11 3 4"w x 27 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