24" X 6" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 8 5/8"] Color_R-4.2 Yellow + Product Details Size -

+ Product Details Size - 36"w X 20"h is the size for the duct opening measurement only

Actual Filter Size – 29 3/4"w x 11 3/4" x 1"

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

The grille comes with all necessary screws for a secure fit

+ Product Details Size - 16"w X 4"h is the size for the duct opening measurement only

24" X 6" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 8 5/8"] Color_R-4.2 Yellow + Product Details Size -+ Product Details Size 24"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 5 8" width X 8 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