16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Grille w20h20 + Product Details Size -

+ Product Details Size - 8"w X 10"h is the size for the duct opening measurement only

offering maximum flexibility

actual front end outer dimensions are approximately 42 5/8" width X 22 5/8" height -

+ Product Details Size - 24"w X 34"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 18" OR 18" X 14" duct opening (measured at the opening)

16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Grille w20h20 + Product Details Size -+ Product Details Size 16" x 30" or 30" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 31. 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