12" x 32" or 32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Outdoor Vent Covers + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 12" or 12" x 8" duct opening (measured at the opening)

featuring a 6" round duct opening

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 36" OR 36" x 28" duct opening (measured at the opening)

75" Width X 25

+ Product Details Size – 14"w X 20"h is the size for the duct opening measurement only

12" x 32" or 32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Outdoor Vent Covers + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 32" or 32" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 31. 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