Hagerty Silver Protector Strips neutralize tarnish causing sulphur gases inside enclosed storage or display areas, such as your flute case.
They keep all polished silverplate and sterling silver (or any solid silver)shining and ready for immediate use for six months. To ensure this, keep your flute case closed after you take your flute out of it's case.
Hagerty strips are totally safe, do not emit any gases, and are non-toxic.