16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille Fixed Blades Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 29 3/4" x 1"

+ Product Details Size – 8"w X 14"h is the size for the duct opening measurement only

and the included installation screws make setup simple and efficient

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

With our extensive selection of Grilles

16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille Fixed Blades Actual Filter Size – 23+ 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