30" x 34" or 34" x 30" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe + Product Details Size –

+ Product Details Size – 16" x 24" or 24" x 16" is the size for the duct opening measurement only

+ Product Details Size - 4"w X 24"h is the size for the duct opening measurement only

+ Product Details Size - 12"w X 14"h is the size for the duct opening measurement only

ensuring it arrives at your home in perfect condition

Actual Filter Size – 23 3/4"w x 19 3/4" x 1"

30" x 34" or 34" x 30" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe + Product Details Size –+ Product Details Size 30" x 34" or 34" x 30" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32. 5" X 36. 5". 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