8" x 32" or 32" x 8" Cube Core Eggcrate Return Air Grille with filter Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 13 3/4" x 1"

Design – Individually adjusting curved blades

75"H – fits a 10" x 8" duct opening

actual front end outer dimensions are approximately 36 5/8" width X 20 5/8" height

[Outer Dimensions: 16

8" x 32" or 32" x 8" Cube Core Eggcrate Return Air Grille with filter Actual Filter Size – 21+ Product Details Size 8" x 32" or 32" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 33. 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