Ensure your acoustic guitar stays in ideal playing condition with this sound hole humidifier. Designed to prevent the wood from cracking due to dry air, it maintains the ideal humidity level within the guitar. Its compact and efficient design makes it a must-have for any guitarist looking to protect their instrument. Features -Color:Black -Material:ABS -Size:8.50X7.50X2.90cm/3.34X2.95X1.14in -Panel protection: protects the guitar panel from cracking, ensuring the guitar's longevity -Sound enhancement: uses humidification to improve the guitar's sound quality and stability -Easy to install: specifically designed for acoustic guitars, making installation simple -Set : includes humidifiers, allowing for use on multiple guitars -Durable construction: crafted from sturdy materials for dependable performance Package list: 16 x guitar humidifier