36" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 28 5/8"] 18" Round Duct Pipe positioning supply and return grills

positioning supply and return grills accordingly

Actual Filter Size – 11 3/4"w x 25 3/4" x 1"

With a 8" diameter for the duct opening measurement

actual front end outer dimensions are approximately 35

actual front end outer dimensions are approximately 28 5/8" width X 12 5/8" height

36" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 28 5/8"] 18" Round Duct Pipe positioning supply and return grills+ Product Details Size 36"w X 26"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 36 5 8" width X 28 5 8" height Actual Filter Size 35 3 4"w x 25 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.