16" x 34" or 34" x 16" Cube Core Eggcrate Return Air Grille 1-Way Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 8" duct openings

it ensures long-lasting durability

+ Product Details Size – 16"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 12 5/8" width X 22 5/8" height

See our separate listing for Butterfly Dmaper to Control Airflow

16" x 34" or 34" x 16" Cube Core Eggcrate Return Air Grille 1-Way Ideal for Walls & Ceilings:+ Product Details Size 16" x 34" or 34" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 35. 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