10" x 10" Cube Core Eggcrate Return Air Grille Color_White if your hole is 20"

if your hole is 20" wide by 14" tall

Designed for optimal air flow and lasting durability

unrestricted airflow with a precise 50° angled design

angle them down for effective warmth distribution

10" x 10" Cube Core Eggcrate Return Air Grille Color_White if your hole is 20"+ Product Details Size 10" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" X 11. 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