D'Addario (Boveda) Reed Vitalizer Pack Single Refill 72%
Reed Vitalizer Humidity Control Packs will last 45-60 days. When the pack becomes hard, simply discard and replace with a new pack. Prevents warping and reed damage Keeps reeds stable in various climates Product may have the "D'Addario" name on it or the generic "Boveda" name.