The Helios FM 100 is a flexible sleeve designed to minimize vibration transmission between fans and duct systems. It is intended for use with compatible FR flanges (sold separately) mounted on fan spigots. Each sleeve is supplied in pairs and includes worm screw clamping bands to ensure a secure and reliable connection. Available in sizes ranging from 100 mm up to 710 mm, the FM 100 provides an effective solution for reducing noise and vibration in ventilation installations.