28" x 30" or 30" x 28" Cube Core Eggcrate Return Air Grille Color_Aluminum these grilles offer both functionality

these grilles offer both functionality and aesthetic appeal

Mounted with a frame and bayonet joint

75"H – fits a 12" X 12" duct opening

Ideal for Walls & Ceilings: Designed for seamless installation in standard duct openings

2 recessed screw holes on each side with screws included

28" x 30" or 30" x 28" Cube Core Eggcrate Return Air Grille Color_Aluminum these grilles offer both functionality+ Product Details Size 28" x 30 or 30" x 28" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 75" X 37. 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