18" X 10" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 20 5/8" X 12 5/8"] w8h8 actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 12 5/8" height

+ Product Details Size – 12"w X 36"h is the size for the duct opening measurement only

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

18" X 10" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 20 5/8" X 12 5/8"] w8h8 actual front end outer dimensions+ Product Details Size 18"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 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