standard sprague rappaport stethoscope
zenc alloy chestpiece,excellent sound conduction,little acoustic attenuation CE/ISO approved
silver dual-membrane chestpiece:the big membrane with diameter 45.5mm is sensitive for sound collecting,while the small membrane is applicable for child.
zenc alloy chestpiece,excellent sound conduction,little acoustic attenuation
standard dual pvc tubing,well-sealed dual sound conduction channel,good resistance to ambient interference,color is iptional.
standard sprague rappaport stethoscope
