36" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 18 5/8"] w18h18 + Product Details Size -

+ Product Details Size - 6"w X 34"h is the size for the duct opening measurement only

+ Product Details Size – 4"w X 12"h is the size for the duct opening measurement only

Design – Heavier gauge than needed

actual front end outer dimensions are approximately 24 5/8" width X 27 5/8" height

4" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

36" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 18 5/8"] w18h18 + Product Details Size -+ Product Details Size 36"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 18 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