Home / Forums / Melodica construction, repair and maintenance / Tubes — some experiments / Reply To: Tubes — some experiments Reply To: Tubes — some experiments February 18, 2020 at 10:44 pm #11195 KevinParticipant Very interesting Clep. I’ve had pretty good luck with the surgical tubing. The drawbacks I’ve found is if it gets bent at an extreme angle it will sometimes kink up and block airflow also any accidental pressure on it will block airflow.