20" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper + Product Details Size –

+ Product Details Size – 12"w X 4"h is the size for the duct opening measurement only

75" width X 33

including Ductless Mini-Split

Slots are angled to diversify the airflow in 2 way direction

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