The Helios Fans RVB 315 is a high-quality connector used to join two circular duct sections of 315 mm diameter. Made from durable galvanized sheet steel, this fitting ensures corrosion resistance and long-lasting performance in ventilation and air extraction systems. Its precise construction provides a tight and secure fit, making it ideal for residential, commercial, and industrial HVAC applications. The RVB 315 allows for efficient airflow continuity while simplifying duct installation and maintenance.