Covidien, Electrostatic Filter / Hme Hygrobac Adult, 22mm Male / 15-22 mm Female / 15 mm Male, 99.99% Efficien, 150 to 1500 Ml, Box Of 50Product Description Combined filter hme reduces set up time. electrostatic hydrophobic membrane protects against cross contamination. Hygroscopic membrane traps patients moisture providing effective airway humidification Low resistance to airflow minimizes work of breathing Effective moisture control reduces the risk of colonization in breathing tubes and minimizes sampling line blockage End tidal co2 sampling port offers convenient access to airway