25" X 12" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 27 5/8" X 14 5/8"] Fixed Blades + Product Details Size -

+ Product Details Size - 20"w X 4"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 36"h is the size for the duct opening measurement only

Mounted with frame and bayonet joint which are included

please note that the total outer dimensions of the grille measure 10" in diameter

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 24" or 24" x 12" duct opening (measured at the opening)

25" X 12" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 27 5/8" X 14 5/8"] Fixed Blades + Product Details Size -+ Product Details Size 25"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27 5 8" width X 14 5 8" height. High Quality high quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Ceiling Design Fixed hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and