24" x 26" or 26" x 24" Cube Core Eggcrate Return Air Grille Grilles Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 19 3/4" x 1"

+ Product Details Size – 10" x 12" or 12" x 10" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 27 5/8" height -

actual front end outer dimensions are approximately 27 5/8" width X 30 5/8" height

actual front end outer dimensions are approximately 30 5/8" width X 24 5/8" height

24" x 26" or 26" x 24" Cube Core Eggcrate Return Air Grille Grilles Actual Filter Size – 31+ Product Details Size 24" x 26" or 26" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 27. 75". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing