8" x 32" or 32" x 8" Cube Core Eggcrate Return Air Grille with filter + Product Details Size -

+ Product Details Size - 4" Diameter is the size for the duct opening measurement only

+ Product Details Size - 36"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are 31

Experience improved airflow dynamics and reduced noise thanks to its long neck body design

+ Product Details Size – 6" x 36" or 36" x 6" is the size for the duct opening measurement only

8" x 32" or 32" x 8" Cube Core Eggcrate Return Air Grille with filter + Product Details Size -+ Product Details Size 8" x 32" or 32" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 33. 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