24" X 12" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 14 5/8"] Color_Red Oak Wood + Product Details Size -

+ Product Details Size - 20"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 40"w X 10"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 13 3/4" x 1"

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

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 25" OR 25" X 16" duct opening (measured at the opening)

24" X 12" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 14 5/8"] Color_Red Oak Wood + Product Details Size -+ Product Details Size 24"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 5 8" width X 14 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