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

+ Product Details Size – 8"w X 20"h is the size for the duct opening measurement only

order a 20x14 grille

+ Product Details Size – 18"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 8"w X 28"h is the size for the duct opening measurement only

+ Product Spec Sheet Aluminum Return Grille Spec Sheet

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