ADC Proscope 660 Adult Lightweight General-Exam Stethoscope, 31.5" Length, Navy Lightweight aluminum chestpiece construction, non-chill diaphragm rim for patient comfort Proprietary diaphragm enhances acoustics response by 50% over traditional design Adjustable aluminum binaurals with pvc eartips. flexible 22' pvc tubing Spare pair of black mushroom eartips included Inspected and packaged in the usa