36" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Supply Grille both individually adjustable

both individually adjustable

if your hole is 20" wide by 14" tall

(Screws included)

UPC – 810107141946

+ Product Details Size – 36"w X 16"h is the size for the duct opening measurement only

36" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Supply Grille both individually adjustable+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 18" OR 18" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 17. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum