INCENTIVE SPIROMETER FREAFTO (3 BALL INCENTIVE SPIROMETER) Compact, high quality break-resistant plastic, 3-ball inhaling breath measurement systemSolid, non-shaky Construction; RemovE bottom for thorough cleaning and hygiene maintenanceDeep Breathing Exerciser for comprehensive respiratory fitness – 3 chambers for differing inhalation rates from 600 cc/sec to 1200 cc/ secHelps achieve optimum lung capacity and restoring disrupted breathing patternsBall Colors may vary