Handcrafted Since 1971 - Pre-assembled - Latex Free. Every professional-grade instrument needs to perform like one. That is why we have developed the world's first premium, single-patient, non-cross contaminant stethoscope. The affordable and high-performance MDF Singularis DUET Stethoscope is unmatched by any infection control, disposable or biohazard stethoscope on the market. Chestpiece: The super-duty, lightweight aluminum dual-head chestpiece is precisely machined and hand polished for the highest performance and durability. Full-rotation acoustic valve stem with green indicator dot allows the user to easily identify the active sound channel. The chestpiece is fitted with an ultra-thin fiber diaphragm for detecting high frequency sounds. The bell, crowned with a non-chill bell ring, provides greater sound amplification, isolation of low frequencies, and patient comfort. Acoustic Tubing: Constructed of thicker, denser, latex-free PVC, the Y-configuration 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. AccuFit Headset: Adjustable stainless steel and brass headset allows the user to create an individualized fit. Soft silicone ComfortSeal eartips (available in standard and small sizes) are clear for hygienic purposes and conform to the ear to seal out extraneous noise while ensuring comfort during extended use. Patented SafetyLock eartip adaptors lead the industry in user safety. Included Accessories: ID tag. Pack of 10.