The Elta APK500SBCYL/003 ancillary pack is a complete accessory solution for installing 500mm ventilation units. This pack contains four anti-vibration mounts to minimise noise and movement, two flexible connectors for secure and adaptable duct connections, two matching flanges for proper sealing, and two mounting feet for stable unit support. Designed to simplify the installation process, this kit ensures reliable and efficient performance in both commercial and industrial HVAC applications.