Speaker stem. If your earbuds are not listed below and they fit this. mm speaker stem and will fit up to a 5.5 mm. Ultimate: TripleFi 10, TripleFi 10vi, SuperFi5, Fi5vi, Fi5eb, Fi5pro, SuperFi4. beats by dr de: Monster beats, Lady gaga, In-ear turbine, Diddy beats.
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