Crafted from practical ABS material, this instrument humidifier is ideal for maintaining the humidity of your ukulele. Its compact size allows it to fit easily hole, ensuring your instrument stays protected from the damaging effects of dry air. Ideal for musicians who want to keep their ukulele in pristine condition. Features -Color:Black -Material:ABS -Size:8.50X7.50X2.90cm/3.34X2.95X1.14in -Note: mainly used for guitar. -Soundboard protection: effectively prevents the guitar soundboard from cracking due to dryness, prolonging the guitar's life -Stable sound quality: continuous humidification keeps the guitar's sound quality stable, making your performance outstanding -Easy to use: simple and portable design, easy to use, providing humidity protection for your guitar at all times -Multiple guitar types: suitable for acoustic, classical, and other types of guitars, catering to various playing requirements -Efficient humidification: highefficiency humidification reduces the need for frequent maintenance, saving both time and money Package list: 6 x guitar humidifiers