25" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 27 5/8" X 22 5/8"] White + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 36"w X 6"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 12 5/8" width X 24 5/8" height

order a 14x20 grille

+ Product Details Size - 34"w X 12"h is the size for the duct opening measurement only

25" X 20" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 27 5 8" X 22 5 8"] White + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 36"w X 6"h is the size for the duct opening measurement only + Product Details Size – 12"w X 30"h is the size for the duct opening measurement only