Medium 7.5mm plugs made for use with: Altus, Azumi, DiMedici, Jupiter, Lyric, and Miyazawa and most other flutes. Will NOT work on Haynes Q series, Amadeus and Sonare 505 series.
Large 8mm plugs made for use with: Muramatsu, Sonare, Trevor James, Gemeinhardt, Emerson, most Yamahas, Powell, Brio and Armstrong French model flutes