22" x 22" Cube Core Eggcrate Return Air Grille Color_White [Outer Dimensions: 50

[Outer Dimensions: 50

Actual Filter Size – 29 3/4"w x 33 3/4" x 1"

+ Product Details Size – 20"w X 4"h is the size for the duct opening measurement only

and squirrels

Filter Size - 19

22" x 22" Cube Core Eggcrate Return Air Grille Color_White [Outer Dimensions: 50+ Product Details Size 22" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 75" X 23. 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 electric