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

Achieve the perfect airflow with adjustable control by rotating the middle disk

85" width X 11

actual front end outer dimensions are 11

much more than required 700 PSI for R410

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