6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade + Product Details Size –

+ Product Details Size – 28"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 30 5/8" height

+ Product Description Enhance your HVAC system's efficiency and your home's aesthetics with our premium aluminum air vent diffuser

Actual Filter Size – 25 3/4"w x 21 3/4" x 1"

+ Product Details Size – 3"w X 10"h or 10"w X 3"h is the size for the duct opening measurement only

6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade + Product Details Size –+ Product Details Size 6" x 20" or 20" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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