10" x 12" or 12" x 10" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in 3 * insulation density is

3 * insulation density is 30kgs/cbm = 0

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

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

actual front end outer dimensions are 3"

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 3 * insulation density is+ 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