16" x 28" or 28" x 16" Cube Core Eggcrate Return Air Grille Color_White Upgrade to a new standard

Upgrade to a new standard of air quality and aesthetics with our Aluminum Ceiling Diffuser

Carefully packaged to prevent damage during shipment

For 6" duct opening

and keep the cold air out during the Winter Months

16" x 28" or 28" x 16" Cube Core Eggcrate Return Air Grille Color_White Upgrade to a new standard+ Product Details Size 16" x 28" or 28" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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