Effective protection against dryness: The humidifier protects your cello from cracking by protecting the wood from dry air through controlled moisture release. Easy to install: Without damaging the instrument, the humidifier is simply hung in the F-hole of your cello. Long-lasting moisture regulation: Thanks to its innovative design, the humidifier maintains optimal humidity within the instrument over a prolonged period. Compatibility: The humidifier is suitable for cellos of of all sizes and perfectly adapts to the shape of your instrument. Durable and reusable: Made from high-quality materials, the humidifier offers a long lifespan and can be used repeatedly to keep your instrument in the best condition.