22" X 6" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 24 5/8" X 8 5/8"] Aluminum - Cube Core + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 34"w X 18"h is the size for the duct opening measurement only

1/4" - 6518 PSI

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 16" duct opening (measured at the opening)

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

+ Product Details Size – 25"w X 10"h is the size for the duct opening measurement only

22" X 6" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 24 5 8" X 8 5 8"] Aluminum Cube Core + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 34"w X 18"h is the size for the duct opening measurement only 1 4" 6518 PSI