20" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper complete with a set of

complete with a set of sponge gasket and mounting frame

actual front end outer dimensions are approximately 11

+ Product Details Size - 32"w X 10"h is the size for the duct opening measurement only

75" width X 31

actual front end outer dimensions are approximately 18 5/8" width X 38 5/8" height -

20" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper complete with a set of+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 30" OR 30" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 29. 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