This is a Gold Plated, Pure Copper In-Ear earphone shell for 10mm driver unit. The name “Mini Piano” is inspired by Final Audio Pianoforte earphone. While Final Audio Pianoforte is much bigger (16mm driver) and this shell is smaller and cute.
We recommend using this earphone shell with our 10mm Sennheiser IE80 drivers. The combo sounds even better than original IE80 because the metal (pure copper) shell outperforms the plastic shell of IE80.