It might sound like a contradition - a lightweight cardiology stethescope. But it doesn't stop there. It has a classic Sprague Rappaport-like dual-output valve stem with an innovative, patented X-configuration dua-lumen tube construction that eliminates the rubbing that can cause acoustic interference. The convertible cardiology bell can be quickly replaced with a pediatric diaphram for versatility in assessing adult and pediatric patients. Precisely handcrafted, the Cario-X™ revolutionizes high-performance stethoscopes and is quite simply the ultimate in auditory diagnostics with unmatched performance and durability.