24" X 30" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 32 5/8"] w22h22 + Product Details Size - LO246 Product Details Size 32 Compatible with Duct 4"

+ Product Details Size - 20"w X 8"h is the size for the duct opening measurement only

making it a reliable choice for improving indoor air quality

+ Product Details Size - 12"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 32 5/8" width X 12 5/8" height -

24" X 30" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 26 5 8" X 32 5 8"] w22h22 + Product Details Size LO246 Product Details Size 32 Compatible with Duct 4" + Product Details Size 20"w X 8"h is the size for the duct opening measurement only making it a reliable choice for improving indoor air quality