16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille Fixed Blades + Product Details Size –

+ Product Details Size – 12" x 20" or 20" x 12" is the size for the duct opening measurement only

and the included installation screws make setup simple and efficient

actual front end outer dimensions are approximately 12 5/8" width X 8 5/8" height -

With our extensive selection of Grilles

16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille Fixed Blades + Product Details Size –+ 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