36" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 38 5/8"] Round Duct Pipe The round side is crimped

The round side is crimped for easy insertion

10"w X 6"h Is The Size For The Duct Opening Measurement Only

+ Product Details Size - 22"w X 18"h is the size for the duct opening measurement only

or diffusers in the home

36" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 38 5/8"] Round Duct Pipe The round side is crimped+ Product Details Size 36"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 38 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 Fixewd hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and