16" x 22" or 22" x 16" Cube Core Eggcrate Return Air Grille Color_White Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 19 3/4" x 1"

Actual Filter Size – 21 3/4"w x 29 3/4" x 1"

+ Product Details Size – 6" x 36" or 36" x 6" is the size for the duct opening measurement only

+ Product Details Size - 8"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 6" x 34" or 34" x 6" is the size for the duct opening measurement only

16" x 22" or 22" x 16" Cube Core Eggcrate Return Air Grille Color_White Actual Filter Size – 11+ Product Details Size 16" x 22" or 22" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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