26" x 30" or 30" x 26" Cube Core Eggcrate Return Air Grille flat stamped steel + Product Details Size -

+ Product Details Size - 10"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 26 5/8" height

Design – Heavier gauge than needed

actual front end outer dimensions are approximately 14 5/8" width X 28 5/8" height

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

26" x 30" or 30" x 26" Cube Core Eggcrate Return Air Grille flat stamped steel + Product Details Size -+ Product Details Size 26" x 30" or 30" x 26" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 75" X 31. 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