32" x 36" or 36" x 32" Cube Core Eggcrate Return Air Grille Compatible With Duct 10in Think of the diameter as

Think of the diameter as a straight line from one end to the other

875" width X 10" height

actual front end outer dimensions are approximately 10 5/8" width X 34 5/8" height

+ Product Details Size - 34"w X 34"h is the size for the duct opening measurement only

32" x 36" or 36" x 32" Cube Core Eggcrate Return Air Grille Compatible With Duct 10in Think of the diameter as+ Product Details Size 32" x 36" or 36" x 32" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 33. 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