The humidifier is designed to protect your guitar in dry conditions. Add water and slowly put it inside the guitar to keep the moisture content right. Easily worries and wood cracks to protect your guitar from the effects of dry weather and destroy your guitar. Features -Material: Plastic -Size: About 8.50X7.50X2.90cm/3.34X2.95X1.14inch -The material used is and anti-fall plastic material, which can resist abrasion and meet your needs in many cases. -It can provide proper moisture to your guitar in the dry weather in winter and make your guitar sound more crisp. -You can buy one for your good friends or family members who are learning guitar. This must be a very practical and thoughtful present. -You can buy this practical guitar panel humidifier at a very favorable and . -It can not only add moisture to your guitar panel, but also maintain your guitar sound hole at the same time. Package list: 3 x humidifiers