The Elta APK500/003 ancillary pack is a complete installation kit designed for 500mm ventilation systems. It comes with four anti-vibration mounts to minimise noise and vibration, two flexible connectors to allow for secure and adaptable ducting, two matching flanges for reliable sealing, and two mounting feet to provide solid support. This all-in-one solution ensures a smooth, stable, and professional HVAC system setup in commercial and industrial environments.