40" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 42 5/8" X 22 5/8"] Filter Grille Filter Size - 17

Filter Size - 17

And is classified as Class 1 Fire Proof - B1

this grille boasts a natural warmth and fine finish

accordion-header { display: flex

+ Product Details Size - 32"w X 25"h is the size for the duct opening measurement only

40" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 42 5/8" X 22 5/8"] Filter Grille Filter Size - 17+ Product Details Size 40"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 42 5 8" width X 22 5 8" height High Quality high quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location sidewall and ceiling Design removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on