24" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 22 5/8"] w12h12 + Product Details Size -

+ Product Details Size - 24"w X 36"h is the size for the duct opening measurement only

the gap will expand and retract to meet perfect air supply needed

please note that the total outer dimensions of the grille measure 8" in diameter

please note that the total outer dimensions of the grille measure 10" in diameter

+ Product Details Size - 8"w X 16"h is the size for the duct opening measurement only

24" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 22 5/8"] w12h12 + Product Details Size -+ Product Details Size 24"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 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 Ceiling Design Fixed hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and