Replacement 3-pack for the D'Addario Humidipak Maintain 2-Way Humidification System.

• 3 replacement packs for the D'Addario Humidipak system
• Automatic humidity control protects your instrument against warping, cracks and other damage cause by lack of humidification
• No more manual adjustments based on seasonal changes, geographic locations, temperature, or other factors Unlike refillable humidifiers
• Eliminates the guesswork and anxiety of maintaining your instrument’s proper humidity level.