D`Addario GH Acoustic Guitar Humidifier

Planet Waves' GH acoustic guitar humidifier protects your guitar without damaging the finish. It is suspended by the strings so that it never touches the guitar body. No clips or fasteners can scratch the guitar finish. Open-cell phenolic foam insert disperses moisture slower and more evenly than sponge. Foam insert shrinks less than 1% when dry vs. sponge, which can deform dramatically. Includes water syringe for filling.