Features: Ergonomic design, comfortably fit the listener's auditory meatus. Suitable for hospitals, schools, clinics or home use. Easy to wear and operate. Durable, latex-free design Comes complete with diaphragm and non-chill large bell The Double tube double sided non-stick acoustic tubing provides insulation for superior sound transmission and seals out ambient noise while preventing the cracking and wearing that can occur from repeated use. The longer-than-average length allows a comfortable space between health professional and patient. Tube made of environmentally friendly latex-free PVC raw materials, longer tubing life. Less likely to pick up stains. The advanced chestpiece is with a unique raised ultra-thin fiber diaphragm for greater amplification and transmission of heart and lung sounds. Descriptions: Convenient to carry Good sound performance Prevent punctured ear drums Specification: Color: black, yellow, red, blue Material: aluminum alloy Y tube material: PVC Diameter: 45mm Total length: 790mm Package included: 1 x Double-sided Stethoscope Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item.