26" x 28" or 28" x 26" Cube Core Eggcrate Return Air Grille Fixed Blades Design – These are specially

Design – These are specially sized to fit into all drop ceilings

75"H – fits a 12" X 10" duct opening

Installation Location – Sidewall and ceiling

+ Product Details Size - 18"w X 12"h is the size for the duct opening measurement only

26" x 28" or 28" x 26" Cube Core Eggcrate Return Air Grille Fixed Blades Design – These are specially+ Product Details Size 26" x 28" or 28" x 26" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 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