30" x 32" or 32" x 30" Cube Core Eggcrate Return Air Grille fixed bar Optional Butterfly Damper Available At

Optional Butterfly Damper Available At Asin: B007CNEL1W

+ Product Details Size - 18"w X 18"h X 2"d (for duct opening measurement only)

Designed for optimum performance

Two Mounting Base Options – Includes both a solid base and a ring base

+ Product Details Size – 36" x 36" is the size for the duct opening measurement only

30" x 32" or 32" x 30" Cube Core Eggcrate Return Air Grille fixed bar Optional Butterfly Damper Available At+ Product Details Size 30" x 32" or 32" x 30" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 31. 75" X 33. 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