Quote:   No, I think they are small filters. I saw them stuck on the end of the earpiece when I removed the tips. Just replacements for when earwax or grime builds up, I guess.

After extensive reading and looking at specs and photos, I decided on the RE-400. They fit even better than the ER6 I had for years and sound incredible. Thanks for all the advice.   Quick question, and this may be stupid, but what are the tiny round circular felt looking things for that...

Thanks for the advice so far. TwinQY, I also appreciate the links to those threads. They don't seem to mention physical size as a comparison factor as far as length from tip to end/wire, but I will read them over more carefully soon.  Usually people don't seem to care about size, only sound...

Hey all - I've been using etymotic ER6 (and hf2) for years and love  them. I ride a motorcycle and need something very low profile (i.e. doesn't stick out of my ear too far due to helmet ear pads) and my ER6 have finally bitten the dust. Short of finding an old set still left somewhere, can you...