36" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 26 5/8"] Aluminum + Product Details Perfect Fit Suitable for all AC 8in diameter 12125SDCLNGBX

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

+ Product Details Size – 16"w X 14"h is the size for the duct opening measurement only

but still light and handy

actual front end outer dimensions are approximately 10 5/8" width X 32 5/8" height

36" X 24" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 38 5 8" X 26 5 8"] Aluminum + Product Details Perfect Fit Suitable for all AC 8in diameter 12125SDCLNGBX + Product Details Perfect Fit & Easy Sizing Designed for a 16" x 16" duct opening (measured at the opening) + Product Details Size – 16"w X 14"h is the size for the duct opening measurement only