20" x 22" or 22" x 20" Cube Core Eggcrate Return Air Grille 14" Diameter High Quality – High-quality steel

High Quality – High-quality steel with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Size - 18"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 36"w X 12"h X 2"d (for duct opening measurement only)

75"H – fits a 16" X 10" duct opening

Universal size

20" x 22" or 22" x 20" Cube Core Eggcrate Return Air Grille 14" Diameter High Quality – High-quality steel+ Product Details Size 20" x 22" or 22" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 23. 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