12" x 32" or 32" x 12" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper + Product Details Size –

+ Product Details Size – 16" x 16" is the size for the duct opening measurement only

+ Product Details Size - 8"w X 6"h is the size for the duct opening measurement only

scratch-resistant

Actual Filter Size – 29 3/4"w x 23 3/4" x 1"

12" x 32" or 32" x 12" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper + Product Details Size –+ Product Details Size 12" x 32" or 32" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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