Kyser Lifeguard Humidifier - for acoustic guitars;

Your acoustic guitar deserves to be protected. It's an investments that requires steps to ensure its value grows over time. The Kyser Lifeguard Humidifier does just that. If you store your instrument in a dry area, simply immerse the Kyser Lifeguard Humidifier in water, shake off excess, and then position it in the sound hole. It will preserve the wood on your acoustic guitar by keeping conditions at the proper humidity. Fits sound holes 3 3/4" to 4 1/8”.