40" X 10" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 42 5/8" X 12 5/8"] sidewall + Product Details Size –

+ Product Details Size – 26"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 38 5/8" height

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

+ Product Details Size - 22"w X 12"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 10" duct opening (measured at the opening)

40" X 10" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 42 5/8" X 12 5/8"] sidewall + Product Details Size –+ Product Details Size 40"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 42 5 8" width X 12 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