6" x 16" or 16" x 6" Cube Core Eggcrate Return Air Grille 2-Way See chart below:

See chart below:

+ Product Details Size - 12"w X 12"h is the size for the duct opening measurement only

Tough reinforced metallized polyester jacket - tear and puncture resistant

+ Product Details Size – 12" x 30" or 30" x 12" is the size for the duct opening measurement only

6" x 16" or 16" x 6" Cube Core Eggcrate Return Air Grille 2-Way See chart below:+ Product Details Size 6" x 16" or 16" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 8. 5" X 18. 5". 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