12" X 6" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 8 5/8"] ceiling + Product Details Size –

+ Product Details Size – 20"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 8"w X 4"h is the size for the duct opening measurement only

Premium Airflow Efficiency - High-performance cube core eggcrate design allows 95% airflow efficiency

with actual outer dimensions of 20

the actual front end outer dimensions are 6" in diameter

12" X 6" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 8 5/8"] ceiling + Product Details Size –+ Product Details Size 12"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 8 5 8" height Actual Filter Size 11 3 4"w x 5 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 grille