16" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 18 5/8" X 18 5/8"] w26h26 Filter Size - 23

Filter Size - 23

3/8" - 4223 PSI

+ Product Details Size - 28"w X 14"h is the size for the duct opening measurement only

875" width X 11

16" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 18 5/8" X 18 5/8"] w26h26 Filter Size - 23+ Product Details Size 16"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 18 5 8" width X 18 5 8" height Actual Filter Size 15 3 4"w x 15 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.