16" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 18 5/8" X 30 5/8"] w34h34 + Product Details Size – Suitable for all AC 8in diameter 12125SDCLNGBX

+ Product Details Size – 25"w X 30"h is the size for the duct opening measurement only

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

actual front end outer dimensions are approximately 16 5/8" width X 22 5/8" height

Design – Removable frame for easy filter change & cleaning - uses a 1" thick filter

16" X 28" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 18 5 8" X 30 5 8"] w34h34 + Product Details Size – Suitable for all AC 8in diameter 12125SDCLNGBX + Product Details Size – 25"w X 30"h is the size for the duct opening measurement only + Product Details Size – 25"w X 10"h is the size for the duct opening measurement only