10" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 12 5/8" X 34 5/8"] Color_Aluminum And is classified as Class

And is classified as Class 1 Fire Proof - B1

actual front end outer dimensions are approximately 32 5/8" width X 26 5/8" height -

+ Product Details Size – 18"w X 10"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 38 5/8" width X 22 5/8" height -

10" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 12 5/8" X 34 5/8"] Color_Aluminum And is classified as Class+ Product Details Size 10"w X 32"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 12 5 8" width X 34 5 8" height Actual Filter Size 9 3 4"w x 31 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