28" x 30" or 30" x 28" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe + Product Details Size -

+ Product Details Size - 26"w X 18"h is the size for the duct opening measurement only

+ Product Spec Sheet

actual front end outer dimensions are approximately 20 5/8" width X 338 5/8" height

Every register is carefully packaged with shrink wrap and cardboard backing to ensure it arrives in perfect condition

Control Your Airflow on drop ceiling grilles

28" x 30" or 30" x 28" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe + Product Details Size -+ Product Details Size 28" x 30 or 30" x 28" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 75" X 37. 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