16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille Fixed Blades and the included installation screws

and the included installation screws make setup simple and efficient

ceiling height)

+ Product Details Size - 16"w X 16"h X 2"d (for duct opening measurement only)

16"w X 3"h Is The Size For The Duct Opening Measurement Only

16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille Fixed Blades and the included installation screws+ Product Details Size 16" x 26" or 26" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 27. 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