10" x 12" or 12" x 10" Cube Core Eggcrate Return Air Grille Filter Grille + Product Details Size –

+ Product Details Size – 10" x 10" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 16 5/8" height

actual front end outer dimensions are 25" Width X 19" Height

and smooth surface

10" x 12" or 12" x 10" Cube Core Eggcrate Return Air Grille Filter Grille + Product Details Size –+ Product Details Size 10" x 12" or 12" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" X 13. 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