10" x 12" or 12" x 10" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + Product Details Size –

+ Product Details Size – 4"w X 10"h or 10"w X 4"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 4" duct openings

actual front end outer dimensions are 3"

actual front end outer dimensions are approximately 34 5/8" width X 30 5/8" height

Great emphasis has been invested in the design of this product to prevent it from kinking in sharp bends & turns and to hold steady and at full diameter in all applications

10" x 12" or 12" x 10" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + Product Details Size –+ Product Details Size 10" x 12" or 12" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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