size of chest piece cover:D 45.5mm       Size of bell:D30.5 mm              Height of chest piece:H 36mm     Length of binaural plus tubing:L 690mm Features:                               1)Sprague rappaport type stethoscope                              2)silver head with colored tubing         3)Brass chrome plated binaural         4)anodized zinc alloy chest piece                            5)comes complete with a clear multi-pocket bag for relevant accessories and replacement parts                 6)this design integrated stethoscope with a timing apparatus enables medical professionals to maintain eye contact with patient during diagnosis.