16" x 18" or 18" x 16" Cube Core Eggcrate Return Air Grille Aluminum Bar Quality Packaging - Carefully Shrink

Quality Packaging - Carefully Shrink Wrapped with Cardboard Backing to Prevent Damage in Shipment

75"H – fits a 18" X 4" duct opening

+ Product Details Size – 24"w X 24"h is the drop ceiling HVAC supply grille size - for T-Bar lay-in

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 12" duct opening (measured at the opening)

+ Product Details Size - 12"w X 28"h is the size for the duct opening measurement only

16" x 18" or 18" x 16" Cube Core Eggcrate Return Air Grille Aluminum Bar Quality Packaging - Carefully Shrink+ Product Details Size 16" x 18" or 18" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 19. 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