SPRAGUE RAPPAPORT STETHOSCOPE S-30 features zinc alloy double heads. The 45,4 mm membrane enables adult auscultation, small membrane enables child auscultation and bells enable auscultation of infant and adult. The device also features double PVC tube, soft ear tips and non-chill rims. The instrument comes in 50 nos shipping cartoons, offers 2 years warranty and includes 1 pair of tube, connectors, 1 pair of soft ear plugs and 3 x membrane adaptors.