20" x 30" or 30" x 20" Cube Core Eggcrate Return Air Grille sidewall transparent design and durable construction

transparent design and durable construction

with no sharp edges to worry about

Incorporated with Integral Butterfly Damper for full Airflow Control

ready to cut for size of vent pipe

20" x 30" or 30" x 20" Cube Core Eggcrate Return Air Grille sidewall transparent design and durable construction+ Product Details Size 20" x 30" or 30" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 31. 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