Description This item is an acoustic guitar humidifier, which protects you precious instrument from shrinking, warping and cracking in the driest and toughest conditions.It releases moisture evenly and slowly inside your guitar without actually touching the instrument. Features -Material: Plastic-Size: About8.50X7.50X2.90cm/ 3.34X2.95X1.14inch-This guitar humidifier is made of durable and wear-resistant plasticmaterial, which is very durable and can meet your long-term use needs.-This humidifier is very small in size, and the plastic material is light in weight, so even if you carry it with you, you will not feel heavy.-You can perform effective and moderate humidification and maintenance on your guitar in bad weather to prevent the guitar panel from lifting or cracking.-It is a very practical and professional guitar panel humidifier, and it is also very convenient to use.-With great quality, good effects, affordable and reasonable prices, you have no reason to refuse such high-quality products. Packing list: 2 x humidifiers