16" x 20" or 20" x 16" Cube Core Eggcrate Return Air Grille Material_Aluminum + Product Details Size –

+ Product Details Size – 6"w X 12"h is the size for the duct opening measurement only

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

ensuring optimal circulation throughout your space

furnishing your modern dream home

16" x 20" or 20" x 16" Cube Core Eggcrate Return Air Grille Material_Aluminum + Product Details Size –+ Product Details Size 16" x 20" or 20" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 21. 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