MDF® Singularis DUET Dual Head Disposable Stethoscope - Single Patient Use 10 Pack 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. 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. Soft silicone ComfortSeal™ eartips are phthalate-free and clear for hygienic purposes. They come in two sizes to seal out extraneous noise while ensuring comfort during extended use.