8" x 34" or 34" x 8" Cube Core Eggcrate Return Air Grille Copper Coil Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 7 3/4" x 1"

Actual Filter Size – 33 3/4"w x 5 3/4" x 1"

Crafted from robust 20-gauge steel

75"H – fits a 10" X 8" duct opening

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

8" x 34" or 34" x 8" Cube Core Eggcrate Return Air Grille Copper Coil Actual Filter Size – 11+ Product Details Size 8" x 34" or 34" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 35. 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