8" x 14" or 14" x 8" Cube Core Eggcrate Return Air Grille Color_R-4.2 Yellow With precise measurements and easy

With precise measurements and easy installation

R value rating of insulation - r3

Crafted meticulously from high-quality steel

85" width X 21

and Diffusers

8" x 14" or 14" x 8" Cube Core Eggcrate Return Air Grille Color_R-4.2 Yellow With precise measurements and easy+ Product Details Size 8" x 14" or 14" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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