10" x 28" or 28" x 10" Cube Core Eggcrate Return Air Grille White Choose from a palette of

Choose from a palette of four elegant colors – white

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

The first number in a grille size represents the width

+ Product Details Size - 10"w X 22"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 15 3/4" x 1"

10" x 28" or 28" x 10" Cube Core Eggcrate Return Air Grille White Choose from a palette of+ Product Details Size 10" x 28" or 28" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" X 29. 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