The ‘Ventilator Kit For 840 Ventilator – 4-078179-00’ is a comprehensive maintenance kit designed for the 840 Ventilator. This kit is intended for use every 10,000 hours to ensure the optimal performance and longevity of your ventilator. It includes all the necessary components for a complete preventative maintenance routine. Please note that this product is available for shipping only within the continental United States.