34" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 36 5/8" X 26 5/8"] Color_Black + Product Details Size -

+ Product Details Size - The listed 4" diameter refers specifically to the size of the duct opening

Total outer size of this grille is

High Quality – Rigid aluminum construction with counter-sunk screw holes (screws included) and no sharp edges

Crafted with top-notch quality aluminum

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 30" OR 30" X 14" duct opening (measured at the opening)

34" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 36 5/8" X 26 5/8"] Color_Black + Product Details Size -+ Product Details Size 34"w X 24"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 36 5 8" width X 26 5 8" height Actual Filter Size 33 3 4"w x 23 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.