The absence of an external flange makes premature extrusion less likely while, being soft and flexible, these tubes are easily shortened to the required size and removal can be readily accomplished, if necessary, by gentle traction. These are long-term ventilation tubes and, in order to minimise the possibility of a residual perforation, they should be deliberately removed.

This soft silicone product is available in both regular pattern and with a tab to aid insertion. The compressibility of these tubes permits insertion with minimal tympanic trauma. They resume their shapes when released in situ and the design makes for good retention, typically twelve to thirteen months.