6" x 18" or 18" x 6" Cube Core Eggcrate Return Air Grille w6h6 Actual Filter Size – 24

Actual Filter Size – 24 3/4"w x 35 3/4" x 1"

Polished Pre-Finish Gloss Varnish Ready To Install - Can Also Be Sanded And Re-finished According To Application Needs

+ Product Details Size – 12"w X 20"h is the size for the duct opening measurement only

+ Product Details Outer dimensions: – fits a duct opening

6" x 18" or 18" x 6" Cube Core Eggcrate Return Air Grille w6h6 Actual Filter Size – 24+ Product Details Size 6" x 18" or 18" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 19. 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