The Elta APK400SCD/001 ancillary pack is designed for use with 400mm ventilation systems, providing a full set of essential installation accessories. The pack includes four anti-vibration mounts to reduce noise and vibration during operation, two flexible connectors for secure and adaptable duct connections, two matching flanges for effective sealing, and two mounting feet to ensure stable support. This comprehensive kit supports efficient, safe, and reliable HVAC system installation in both commercial and industrial settings.