5-Pack Westmed #0361 Pediatric Trach Collar Mask

ADJUSTMENT for minimum or maximum positive expiratory pressure (PEP). Turn the vented cap to adjust the strength of the exhaled airflow. Effectively exercise the working ability of the lungs.
METHOD OF OPERATION. Choose from two sizes of ball to better control the frequency of vibration. The device produces a range of oscillation frequencies between 6 and 20 Hz, corresponding to the range of human pulmonary resonance frequencies. These vibrations loosen mucus from the airway walls.
MATERIALS. Medical-grade materials. CONTENTS: 1 no. dustproof bag, 2 no. vibrating balls, 1 no. mouthpiece, 1 no. mucus removal device.