18" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 28 5/8"] Floor Grille High Quality – High-quality

High Quality – High-quality

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

+ Product Details Size - 22"w X 20"h is the size for the duct opening measurement only

+ Product Details Size – 12" X 2" is the size for the duct opening (floor/vent hole) measurement only

Actual Filter Size – 9 3/4"w x 7 3/4" x 1"

18" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 28 5/8"] Floor Grille High Quality – High-quality+ Product Details Size 18"w X 26"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 5 8" width X 28 5 8" height Actual Filter Size 17 3 4"w x 25 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.