Thermovent T Heat & Moisture Exchanger, Non-Sterile, 5g Weight, Media: Corrugated paper, Resistance to Flow: 2.0 cm H2O at 60 L/min, Moisture Output: 25 mg H2O/L at 34c for 1,000 mL tidal volume, Connection: 15 mm I.D. raised fenestration on patient end