Flanger FU-10 Professional Sound Hole Humidifier for Acoustic Guitars

Features: Designed for acoustic guitar with 100mm sound hole diameter. Used as a guitar humidifier, simply moisten the included sponge and install for reusable humidification. Working as a guitar dehumidifier, using the included desiccant to absorb moisture around your guitar. Can also be used as a normal sound hole cover to eliminate unwanted feedback. Soft rubber covers the insert edge, no damage to your guitar. Specifications: Material: Plastic + Rubber Compatible Sound Hole Size: Dia 10cm / 3.9in Item Size: 11 * 1cm / 4.3 * 0.4oz Item Weight: 53g / 1.9oz Note: This sound hole cover is not suitable for guitars whose fretboard has reached the sound hole. The guitar showed in the picture is not included. Package Included: 1 * Sound Hole Cover 1 * Sponge 1 * Bag of Desiccant