Description5000ml breathing exerciser consists of a large volume measurement and advanced low-work-of-breathing filter. Its compact, ergonomic design with built-in handle has gradations on both sides of unit and good/better/best flow window for visualization of daily improvement. Single-patient use.Features- Color: As shown.- Material: Plastic.- Size: 17 x 17 x 5 cm.- Bite the mouth to use safe and comfortable plastic material, combined with ergonomic design.- Pipeline bending resistance, not affected by the patient's posture, easy to clean, durable.- Bright color sphere, integrate into color psychology, patient training.- Convenient double-card connector design, tight connection is not easy to fall off.- The main body is thickened and reinforced, forming in one, durable and anti-falling.