18" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Aluminum } function toggleAccordion(event) { event

} function toggleAccordion(event) { event

Airflow Control – Adjustable airflow lever allows precise control over the direction and volume of air

each available in a variety of high-quality materials like brushed nickel

our Circular Air Supply Valves are ideal for low and medium pressure ventilation air conditioning systems

actual front end outer dimensions are approximately 18 5/8" width X 27 5/8" height

18" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Aluminum } function toggleAccordion(event) { event+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 6" OR 6" X 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 5. 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