28" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter + Product Details Perfect Fit

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

See our separate listing of T-Bar Supply Grilles

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

actual front end outer dimensions are approximately 26 5/8" width X 28 5/8" height

28" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 12" OR 12" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 11. 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