A&M XTM S P4 User Manual page 9

You can use standard ear pieces together with a
standard tube or custom-made ear pieces together
with an earhook and tube.
You can easily exchange the standard ear pieces
and clean the standard tube. Read more in section
"Maintenance and care".
Standard ear pieces / tubes
ThinTube
Custom-made ear pieces
Examples:
Open Tip open or closed
Open Tip semi-open
Open Tip double
Size
9