The duplex Teaching Stethoscope with double chest-piece and two binaural has been developed especially for teaching purposes. Excellently suited for auscultation by two individuals.Double-headed chest-piece made of stainless steel.Matt chromium plated binaural with integrated spring. Special membrane with a diameter of 48 mm, with particularly flat and soft rims for improved adaptation on the skin.Bell diameter is 36 mm Overall length is 115 cm Supplied with 2x extra pairs of ear-tips &amp