12" x 30" or 30" x 12" Cube Core Eggcrate Return Air Grille Powder-Coated Some of the best features

Some of the best features aren't readily apparent

75" width X 25

With these options

4" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

12" x 30" or 30" x 12" Cube Core Eggcrate Return Air Grille Powder-Coated Some of the best features+ Product Details Size 12" x 30" or 30" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 31. 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