Features: 1. Guitar sound control humidifier, rubber can completely close the sound control, which is not easy to volatilize after humidification and will not damage the paint surface when fixed.2. Use natural wood pulp sponge, which has strong water absorption, and it only takes three seconds to dry until it is saturated with water.3. Ensure the humidity in the guitar resonance box, prevent the box from cracking and prolong the service life of the guitar.4. High wear resistance and excellent durability.5. Easy to install and durable.Name: Guitar Sound Hole HumidifierWeight: about 54GSize: about 11 x 1.2 x 11cmMaterial: ABS+rubbercolour: As shownPackage Contents:1 x Humidifier2 x SpongeOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.