Laerdal Pocket Mask W One Way Valve & Filter (w o O2 Inlet) Interferential Stimulators * Telescoping parts are manufactured Endoscopy * Telescoping parts are manufactured with internal bushings and external lock nuts to provide totally silent usage Black 27 * Tunable diaphragm conveniently alternates between low and high frequency sounds without the need to turn over the chestpiece * Excellent acoustic seal and comfortable fit with patented Snap Tight soft sealing eartips * Comfortably angled anatomically correct headset * Patient friendly nonchill rim and diaphragm * High performance single lumen tubing in a range of attractive colors * 3 year warranty * Without O2 Inlet * Masks include a one way valve * Prevents mouth to mouth contact with victim's face * Facilitates a patient airway * Combines moderate head tilt jaw lift and opening of the mouth * More effective ventilation through mouth and nose simultaneously leakproof seal * * (Model 8040A): includes an oxygen inlet valve *