12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille Curved Blade Steel + Product Details Size –

+ Product Details Size – 28"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 7

+ Product Details Size – 12" x 28" or 28" x 12" is the size for the duct opening measurement only

+ Product Details Size - 34"w X 6"h is the size for the duct opening measurement only

12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille Curved Blade Steel + Product Details Size –+ Product Details Size 12" x 14" or 14" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 15. 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