Breathing device lung exercise

Increase your lung capacity by training yourself to breathe deeply and clear the airways using the three-ball spirometer. The lung training device contains three balls; meaning the blue ball indicates you can inhale 600 ml, the red ball 900 ml, while the yellow ball 1200 ml. It is connected to a flexible tube with a mouthpiece for breathing. Materials: PVC. Size: approximately 13.7 × 6.5 × 16.3 cm (5.4 × 2.6 × 6.4 inches). Package contents: 1 × three-ball spirometer.