6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Grille Round Damper Ring Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 4" duct openings

1-1/8" - 2334 PSI

+ Product Details Size - 25"w X 8"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 30"h is the size for the duct opening measurement only

6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Grille Round Damper Ring Ideal for Walls & Ceilings:+ Product Details Size 6" x 22" or 22" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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