12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 12" Diameter + Product Details Size -

+ Product Details Size - 14"w X 34"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 11 3/4" x 1"

With a 8" diameter for the duct opening measurement

Actual Filter Size – 7 3/4"w x 25 3/4" x 1"

12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 12" Diameter + Product Details Size -+ Product Details Size 12" x 16" or 16" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 17. 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