20" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 20 5/8"] Grilles 5" width x 13

5" width x 13

75" width X 31

+ Product Details Size – 18"w X 36"h is the size for the duct opening measurement only

no sharp edges

High Quality – high quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

20" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 20 5/8"] Grilles 5" width x 13+ Product Details Size 20"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 20 5 8" height High Quality high quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall & ceiling Design removable frame for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your