20" X 50" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 52 5/8"] Width_20in + Product Details Size –

+ Product Details Size – 18"w X 12"h is the size for the duct opening measurement only

R Value Rating of Insulation - R3

+ Product Details Size - 25"w X 16"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 38 5/8" width X 14 5/8" height -

With a 6" diameter for the duct opening measurement

20" X 50" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 52 5/8"] Width_20in + Product Details Size –+ Product Details Size 20"w X 50"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 52 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