34" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w25h25 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 14" OR 14" x 20" duct opening (measured at the opening)

75" width X 33

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 30" or 30" x 6" duct opening (measured at the opening)

with no sharp edges

34" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w25h25 + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 33. 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 Made from