12" X 14" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 16 5/8"] Insulated Line Set Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 35 3/4" x 1"

Actual Filter Size – 17 3/4"w x 17 3/4" x 1"

+ Product Details Size – 24"w X 20"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 24"h is the size for the duct opening measurement only

12" X 14" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 16 5/8"] Insulated Line Set Actual Filter Size – 31+ Product Details Size 12"w X 14"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 16 5 8" height Actual Filter Size 11 3 4"w x 13 3 4" x 1" High quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter