16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille return filter Actual Filter Size – 35

Actual Filter Size – 35 3/4"w x 25 3/4" x 1"

+ Product Details Size - 10"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 8"h is the size for the duct opening measurement only

+ Product Details Size – 20" x 28" or 28" x 20" is the size for the duct opening measurement only

16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille return filter Actual Filter Size – 35+ Product Details Size 16" x 26" or 26" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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