24" x 12" Steel Fixed Bar Return Grille - Sidewall and Ceiling w28h28 It has an outer surface

It has an outer surface made of high-quality aluminum foil and an inner surface made of metalized PET with inside high-tensile spring steel wire

+ Product Details Size - 32"w X 4"h is the size for the duct opening measurement only

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+ Product Details Size - 14"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 23 3/4"w x 9 3/4" x 1"

24" x 12" Steel Fixed Bar Return Grille - Sidewall and Ceiling w28h28 It has an outer surface+ Product Details Size 24"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 2" wider. High Quality High quality steel with counter sunk screw holes (screws included) and no sharp edges. Installation Location Sidewall and ceiling. Design Heavy gauge steel. Heavier gauge than needed, built for durability and long life in mind, and yet lightweight and easy to handle. Noise free components no