The Helios Fans RVB 400 is a high-quality duct connector designed for joining two ventilation pipe sections with a 400 mm diameter. Manufactured from durable galvanized sheet steel, this fitting offers excellent resistance to corrosion and mechanical stress. It ensures a secure and stable connection between duct sections, supporting consistent airflow and efficient ventilation system performance. Ideal for commercial and industrial HVAC applications, the RVB 400 provides a dependable and straightforward solution for connecting ductwork.