Etymotic Research ETY-COM ER-22 User Manual page 4

The ETY-COM headset is supplied with assorted eartips to achieve
an optimal fit.
White eartip
3-flange
(standard)
Cleaning:
1. Carefully remove the eartip from the earphone.
2. Use water and mild soap to remove dirt and
earwax from the eartip.
3. Rinse and completely dry the eartip.
4. Push the eartip completely on the stem.
Foam eartip
Replace the foam eartip as needed.
Eartips
3-flange
(long stem)
2-flange
(small)
2-flange
(large)