22" x 22" Cube Core Eggcrate Return Air Grille RG66 Black-HP 75"H – fits a 16"

75"H – fits a 16" X 8" duct opening

+ Product Description Upgrade your ventilation with our premium grilles and registers

including the ability to mount without removing the thermostat when using the ring base

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 10" duct openings

+ Product Details Size – 16"w X 20"h is the size for the duct opening measurement only

22" x 22" Cube Core Eggcrate Return Air Grille RG66 Black-HP 75"H – fits a 16"+ Product Details Size 22" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 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 electric