The black GH3 keys are made of synthetic ebony and the white keys of luxurious ivory

then the solution is here

With a 6-cad tremolo bridge

Citroën C3 2002 - 2005

Alpine MusicSafe Pro Ørepropper (Sort) EM-Nordic The black GH3 keys areProtects against tinnitus 3 high fidelity filters = 3 levels Excellent sound quality Perfect fit, can be worn for hours Can be reused many times Alpine MusicSafe Pro, black Easy to clean High tech AlpineThermoShape material Supplied with storage box, cleaning fluid and 3 filters Filters: Gold (22 dB) = high protection Silver (19 dB) = medium protection White (16 dB) = low protection See also Alpine MusicSafePro transparent