The Helios Fans RVB 250 is a durable duct connector designed to join two circular duct sections with a diameter of 250 mm. Constructed from robust galvanized sheet steel, it provides a secure and corrosion-resistant connection, ensuring reliable airflow throughout your ventilation system. Ideal for HVAC installations in residential, commercial, and industrial settings, the RVB 250 allows for quick and easy coupling of ductwork with matching diameters, helping to maintain system integrity and efficiency.