10" x 26" or 26" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 28.5"] w36h36 Equipped with a lever to Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Equipped with a lever to adjust airflow to your preference

Actual Filter Size – 33 3/4"w x 13 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 32" or 32" x 12" duct opening (measured at the opening)

'block' : 'none'

+ Product Details Size – 10" round duct opening-

10" x 26" or 26" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum White [Outer Dimensions: 12.5" X 28.5"] w36h36 Equipped with a lever to Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Equipped with a lever to adjust airflow to your preference Actual Filter Size – 33 3 4"w x 13 3 4" x 1"