24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille 8" Round Duct Pipe actual front end outer dimensions

actual front end outer dimensions are approximately 24 5/8" width X 18 5/8" height

Mounted with frame and bayonet joint which are included

with actual outer dimensions of 12

which the interior PET provides

24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille 8" Round Duct Pipe actual front end outer dimensions+ Product Details Size 24" x 28" or 28" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 29. 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