Classic Dual Head Stethoscope with Anti-chill Ring for Child Use

Classic Dual Head Stethoscope with Anti-chill Ring for Child Use
Specification:
1.Dual head chest piece for adult ,oxidized aluminum chest piece . The membrane is sensitive for sound collecting . Applicable for auscultation of heart and lung
2.The small bell-like chest piece is used for auscultation of slight and low frequency sound 
3.Aluminum alloy chest piece ,good sound conduction
4.Standard single PVC tubing , color is optional