The Helios FM 315 flexible connector is designed to minimize vibration transmission between fans and duct systems, helping to reduce noise and mechanical stress. Made to be used with matching FR flanges (sold separately), it fits securely on fan spigots. This flexible sleeve comes supplied in pairs and includes worm screw clamping bands to ensure a tight and reliable connection. Available in sizes ranging from 100mm up to 710mm, the FM 315 offers an effective solution for vibration isolation in ventilation installations.