Westone: Westone 1 2 3 4 4R W10 W20 W30 W40 W50 W60 etc. Etymotic: ER4B ER4P ER4S ER22 ETY8 HF2 HF3 HF5 MC3 MC5 etc. Shure: E3c E4c E5c E3g E4g E500 SE110 SE112 SE115 SE210 SE215 SE310 SE315 SE420 SE425 SE530 SE535 SE846 etc.
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