32" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w8h8 75" width X 33

75" width X 33

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 8" OR 8" X 18" duct opening (measured at the opening)

The installation process is a breeze

Made of high quality aluminum that will never rust

+ Product Details Size – 32"w X 16"h is the size for the duct opening measurement only

32" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w8h8 75" width X 33+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 36" Or 36" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 35. 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