20" x 32" or 32" x 20" Cube Core Eggcrate Return Air Grille 18" Diameter Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 17 3/4" x 1"

For example

this diffuser ensures long-lasting durability and adds a touch of elegance to any space

+ Product Details Size – 14"w X 16"h is the size for the duct opening measurement only

Actual Filter Size – 19 3/4"w x 21 3/4" x 1"

20" x 32" or 32" x 20" Cube Core Eggcrate Return Air Grille 18" Diameter Actual Filter Size – 25+ Product Details Size 20" x 32" or 32" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 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