26" x 28" or 28" x 26" Cube Core Eggcrate Return Air Grille 6" Diameter + Product Details Size –

+ Product Details Size – 28" x 32" or 32" x 28" is the size for the duct opening measurement only

+ Product Details Size – 36"w X 20"h is the size for the duct opening measurement only

875" width X 16" height

+ Product Details Size - 6"w X 6"h X 2"d (for duct opening measurement only)

85" width X 19

26" x 28" or 28" x 26" Cube Core Eggcrate Return Air Grille 6" Diameter + Product Details Size –+ Product Details Size 26" x 28" or 28" x 26" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 75" X 29. 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