36" X 22" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 24 5/8"] Return Grille 75" width X 13

75" width X 13

75" width X 15

Designed for both wall and ceiling applications

please note that the total outer dimensions of the grille measure 7" in diameter

+ Product Details Size - 12"w X 12"h is the size for the duct opening measurement only

36" X 22" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 24 5/8"] Return Grille 75" width X 13+ Product Details Size 36"w X 22"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 36 5 8" width X 24 5 8" height Actual Filter Size 35 3 4"w x 21 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.