16" x 28" or 28" x 16" Cube Core Eggcrate Return Air Grille Color_White rotate it to align with

rotate it to align with the square frame

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

Carefully packaged to prevent damage during shipment

+ Product Details Size - 10"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 36 5/8" width X 28 5/8" height

16" x 28" or 28" x 16" Cube Core Eggcrate Return Air Grille Color_White rotate it to align with+ 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