Respiratory Filter For Adults, Efficiency 99.99%, Disposable, With A Hydrophobic Membrane, Electrostatic, Connector On The Patient Side 22M/15F, Device 22F/15M, Flow Resistance From Cm H₂O: 0.9, Breathing Volume, Ml :200, Intake, Dead Space, Ml :60; Respiratory Filter Pediatric, Effectiveness ... More