8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille Insulated Line 2 recessed screw holes on

2 recessed screw holes on each side with screws included

powder-coated finish adds a touch of elegance while also being scratch-resistant

+ Product Details Size – 32"w X 22"h is the size for the duct opening measurement only

+ Product Details Size - 4"w X 34"h is the size for the duct opening measurement only

8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille Insulated Line 2 recessed screw holes on+ Product Details Size 8" x 18" or 18" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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