This is the MDV-6 O2 Demand Valve for Oxygen EFR Emergency Response Features: Includes a 6' (1.8 m) oxygen hose, 40 lpm flow rate 40 lpm is maintained at cylinder pressures between 500-2200 psig, allowing for complete use of cylinder contents Easy to clean and service, valve obstruction may be removed during resuscitation with minimal interruption; valve may also be chemically disinfected Compact, lightweight and durable, will withstand corrosive materials and harsh weather conditions Face mask shown in image is not included. This Demand/Resuscitator Valve is designed to provide 100% oxygen to breathing or non-breathing patients in an emergency situation. The valve can be used in conjunction with a portable oxygen cylinder equipped with a pressure regulator or with a central oxygen source. The valve operates on a regulated oxygen supply of 40-60 psig and reduces this pressure to a physiologically acceptable level with a pressure limit of 60?5 cm H2O. The slight negative pressure created by a spontaneously breathing patient's inspiratory effort triggers the valve from a non-flow state to a flowing state. The non-breathing valve permits it to be used as a resuscitator in combination with a manually operated button located on top of the valve. The valve can be utilized with a mask, endotracheal tube or tracheotomy tube. This Demand/Resuscitator Valve includes a 6' hose with female DISS fitting connections. Face mask shown in image is not included.