12" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 18 5/8"] 18in diameter [Outer Dimensions: 20

[Outer Dimensions: 20

actual front end outer dimensions are approximately 24 5/8" width X 8 5/8" height

+ Product Details Size - 18"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 28 5/8" height

actual front end outer dimensions are approximately 16 5/8" width X 20 5/8" height

12" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 18 5/8"] 18in diameter [Outer Dimensions: 20+ Product Details Size 12"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 18 5 8" height Actual Filter Size 11 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 Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter