28" x 30" or 30" x 28" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe Every register is carefully packaged

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

Actual Filter Size – 21 3/4"w x 5 3/4" x 1"

+ Product Spec Sheet

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

Actual Filter Size – 15 3/4"w x 24 3/4" x 1"

28" x 30" or 30" x 28" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe Every register is carefully packaged+ 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