Home / Forums / General melodica discussion / Photo—-Tubing and Fixture for Hohner Melodica / Reply To: Photo—-Tubing and Fixture for Hohner Melodica Reply To: Photo—-Tubing and Fixture for Hohner Melodica April 15, 2017 at 11:37 pm #8811 Alan BrintonParticipant I was indicating inside diameter by ID and outside by OD, Paul. Should have made that clearer. My Juliett Pianola project is on hold until I get in the mood to decide what to do next.