Etymotic Research ER6i-18 Replacement Triple Flanged Eartips for Etymotic Earphones (Gray, 5 Pairs) (Discontinued by Manufacturer) Replacement 3-flange eartips for Etymotic earphones or earplugs High level of noise isolation For ER4, ER6, ER6i, ETY8 and other Etymotic in-ear style earphones Gray color Includes 5 pairs of replacement eartips