8" x 28" or 28" x 8" Cube Core Eggcrate Return Air Grille w8h8 Rust-Free Aluminum - Made from

Rust-Free Aluminum - Made from strong

powder-coated steel

Actual Filter Size – 25 3/4"w x 21 3/4" x 1"

Actual Filter Size – 11 3/4"w x 9 3/4" x 1"

actual front end outer dimensions are approximately 22 5/8" width X 38 5/8" height

8" x 28" or 28" x 8" Cube Core Eggcrate Return Air Grille w8h8 Rust-Free Aluminum - Made from+ Product Details Size 8" x 28" or 28" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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