The Helios FM 500 flexible sleeve is engineered to minimize vibration transmission between fans and ductwork, enhancing system performance and noise control. Designed for use with matching FR flanges (accessory) on fan spigots, this flexible connector is supplied in pairs and includes worm screw clamping bands to ensure a secure and straightforward installation. Available in sizes ranging from 100 mm to 710 mm, the FM 500 is a reliable choice for vibration isolation in ventilation systems.