Versamed iVent 201 Breathing Circuit Case of 20 Y-Type Circuit used only with iVent 201 Ventilators. For use with all iVent 201 including IC, AB, HC, EMS and DHHS machines Includes flow sensor Circuit is appropriate for delivering aerosolized medication (MDI or nebulization) Complete with external exhalation valve, wye connector, flow sensor, color coded lines and test caps Individually packaged 20 to a case (Direct from Manufacturer, Genuine GE/Versamed product)