Let's face it, this is no master cardiology III or other high dollar scope.  It does however do the job. This was puchased years ago and still serves as a back up for both myself and the wife.  The tubing has lasted and hasn't hardened over the years.  The ear pieces did have to be replaced.  The bell housing is solid.  Other consumables are still holding strong.  Not bad for the price so we're happy w/ our backup.