12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille Insulated Line Set + Product Details Size –

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

actual front end outer dimensions are approximately 24 5/8" width X 38 5/8" height

Crafted from robust 20-gauge steel

actual front end outer dimensions are approximately 36 5/8" width X 8 5/8" height

High Quality – Heavy-gauge all-steel construction

12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille Insulated Line Set + 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