For use with the following stethoscopes:
Littmann® CORE Digital Stethoscope // Littmann® Electronic Model 3200 // Littmann® Electronic Model 3100 // Littmann® Master Cardiology™ // Littmann® Cardiology IV™ // Littmann® Master Classic II™ // Littmann® Classic III™ // Littmann® Classic II S.E. // Littmann® Classic II Paediatric // Littmann® Classic II Infant // Littmann® Select // Littmann® Lightweight