Etymotic Research ER38-18 3-Flange Replacement Eartips - 10 Pack - Gray,large
Package of 10 large gray 3-flange eartips. Ear canal opening 8-13mm. Designed for use with ER4 series, HF series, etyBLU2, Ety-Com, MusicPro, Gunsport Pro, EB-15 BlastPlug, and HD15-High Definition Electronic Earplugs.