These are the eartips that are used on the Alpine attenuating earplugs so if spares are needed, these are the direct replacements. They do have a special feature that should make them a real alternative to all of the eartips we list for headphones: that is that the sound exit port flares out to about double the diameter from front to back. In an ideal acoustic path this almost exactly how it should be configured and should improve the audio quality of any in-ear headphone - especially the high frequencies.