Product FeaturesDisposable Filters (24)Protects you from particles floating in your air such as dust and dander. Luna G3 Heated Tubing (4) The Luna G3 Heated Tubing is designed for the Luna G3 series of devices.Luna G3 Water Chamber (2)This Humidifier Water Chamber is designed to reduce dryness and irritation by adding moisture and heat (if applicable) to the airflow and is made for all Luna G3 Series BPAP Machines. It can be opened for easy refilling and removed completely for thorough cleaning.