6" x 26" or 26" x 6" Cube Core Eggcrate Return Air Grille White + Product Details Size -

+ Product Details Size - 30"w X 30"h is the size for the duct opening measurement only

75"H – fits a 16" X 6" duct opening

4" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

+ Product Details Size – 8" x 24" or 24" x 8" is the size for the duct opening measurement only

Filter Size - 19

6" x 26" or 26" x 6" Cube Core Eggcrate Return Air Grille White + Product Details Size -+ Product Details Size 6" x 26" or 26" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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