6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Grille Width_20in Design - special "V" shaped

Design - special "V" shaped louvers ensure 100% view block while ensuring easy un-restricted air flow

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 6" duct openings

And Meets/Beats ASTM B280 Standard

Our filter grille latch is easy to use on your fingers and requires no screwdriver to open

+ Product Details Durable Construction - Made with clear

6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Grille Width_20in Design - special "V" shaped+ Product Details Size 6" x 28" or 28" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 29. 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