12" x 12" Cube Core Eggcrate Return Air Grille Fixed Blades + Product Details Size -

+ Product Details Size - 16"w X 8"h is the size for the duct opening measurement only

+ Product Spec Sheet

875" width X 15

+ Product Details Size – 14"w X 4"h is the size for the duct opening measurement only

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