3M LITTMANN TEACHING STETHOSCOPE

40 inch (101,6cm) bell and diaphragm with two headsets - Classic II S.E. Teaching Stethoscope These high quality stethoscopes are available in two chestpiece options that offer both bell and diaphragm mode auscultation. The traditional style chestpiece of the 3M™ Littmann® Classic II S.E. stethoscope or the single-sided tunable chestpiece design of the 3M™ Littmann® Master Classic II stethoscope have patented tunable diaphragms

This has been discontinued by 3M and the alternative we can offer is the ADC 613 Clinician Adscope Teaching Stethoscope 

http://www.medshop.co.nz/stethoscopes?product_id=1571