36" X 30" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged- [Outer Dimensions: 38 5/8" X 32 5/8"] w34h34 you can attain the diameter

you can attain the diameter of the vent

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actual front end outer dimensions are 11

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

actual front end outer dimensions are approximately 12 5/8" width X 10 5/8" height

36" X 30" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged- [Outer Dimensions: 38 5/8" X 32 5/8"] w34h34 you can attain the diameter+ Product Details Size 36"w X 30"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 32 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