This is a universal guitar humidifier that can protect your precious instrument from shrinking, warping and cracking under dry and difficult conditions. This humidifier uses premium materials and can serve you for a long time. Features -Color:Black -Material:Plastic,sponge, electronics -Size:8.70X5.40X4.00cm/3.42X2.12X1.57in - This guitar humidifier is suitable for folk guitars of various sizes and shapes on the market, which is very practical. - It can effectively prevent the front panel and back panel from or denting caused by weather and causing the piano box to break. - It’s small in size, so that it can be carried with you, you can humidify and maintain your guitar panel and sound hole anytime, anywhere. - When not in use, you can put guitar humidifier in a drawer for storage, so it does not take up any space. - We always provide you with fine workmanship products on the premise of performance. Package list: 1 x guitar humidifier 1 x dropping bottle