The Helios FRS-ÜG 51 – 75 FlexPipe straight mixed connection is designed for horizontal connections between round ventilation ducts (FRS‑R 75) and flat ducts (FRS‑R 51). Constructed from shockproof polypropylene, this connector ensures reliable and durable duct joining. The unit includes fixing brackets and four anti-tearing clips for secure installation and added stability. Ideal for flexible ducting systems where mixed duct profiles require seamless connection.