30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter d + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 26"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 16 5/8" height

Actual Filter Size – 7 3/4"w x 9 3/4" x 1"

+ Product Details Size – 26"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 38 5/8" width X 16 5/8" height -

30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter d + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 26"w X 36"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 20 5 8" width X 16 5 8" height