14" x 20" or 20" x 14" Cube Core Eggcrate Return Air Grille steel display === '') { dd

display === '') { dd

1-1/8" - 2334 PSI

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

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

14" x 20" or 20" x 14" Cube Core Eggcrate Return Air Grille steel display === '') { dd+ Product Details Size 14" x 20" or 20" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 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