32" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w16h16 actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 20 5/8" height

R Value Rating of Insulation - R3

Multi-shutter damper with handle operator to adjust air flow

actual front end outer dimensions are approximately 14 5/8" width X 10 5/8" height

including the ability to mount without removing the thermostat when using the ring base

32" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w16h16 actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 8" OR 8" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 9. 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