24" x 34" or 34" x 24" Cube Core Eggcrate Return Air Grille 8" Round Duct Pipe 75"H – fits a 20"

75"H – fits a 20" X 12" duct opening

actual front end outer dimensions are approximately 10 5/8" width X 18 5/8" height

+ Product Details Size – 8"w X 18"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 4"h is the size for the duct opening measurement only

24" x 34" or 34" x 24" Cube Core Eggcrate Return Air Grille 8" Round Duct Pipe 75"H – fits a 20"+ Product Details Size 24" x 34" or 34" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 35. 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