Features: The guitar soundhole humidifier can effectively protect the wooden structure of the guitar, preventing cracking and deformation caused by drying. The humidifier is made from ABS material, with thickened sponge inside and breathable holes all around, making it easy to use. Used to alleviate problems such as panel cracking, wrinkling, and sinking caused by dryness on guitar panels, it has the function of balancing humidification, alleviating dryness, and protecting the guitar. Suitable for all guitar enthusiasts, especially those who often play or store guitars in dry environment. Can be used in guitar practice rooms, performances place, homes, and any other places that require appropriate humidity. Specifications: Material: ABS Size: Approx. 7.5x3x8.5cm/2.95x1.18x3.35inch Package Includes: 1x Guitar Humidifier note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.