12" x 36" or 36" x 12" Cube Core Eggcrate Return Air Grille White + Product Details Size -

+ Product Details Size - 10"w X 36"h is the size for the duct opening measurement only

Actual Filter Size – 24 3/4"w x 23 3/4" x 1"

High Quality – High-quality aluminum with counter-sunk screw holes (screws included) and no sharp edges

Actual Filter Size – 25 3/4"w x 7 3/4" x 1"

+ Product Details Size - 24"w X 22"h is the size for the duct opening measurement only

12" x 36" or 36" x 12" Cube Core Eggcrate Return Air Grille White + Product Details Size -+ Product Details Size 12" x 36" or 36" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 37. 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