32" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter Optional Butterfly Damper Available At

Optional Butterfly Damper Available At Asin: B007CNEL1W

featuring a 8" round duct opening

Airflow – Easy unrestricted airflow for your HVAC system

Tamper-Proof Locking Mechanism – Includes an eight-tumbler lock with a supplied key to prevent unauthorized access

actual front end outer dimensions are approximately 28 5/8" width X 22 5/8" height

32" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter Optional Butterfly Damper Available At+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 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 Made from