The HBS Homecare silver protective strips can keep wind instruments from tarnishing for up to six months per piece. You only need one or two strips, which you put in the instrument case, depending on how big the instrument is. The strips get rid of the sulphur in the air, which keeps the instrument from changing colour over time. Always keep unused strips in their original packaging (polybag) so that they are not exposed to air.
HBS Homecare Brillant Silber Schutzstreifen