Features: Sound hole cover designed for EQ folk guitars(sound hole dia.10cm). Can reduce unwanted feedback in live amplified settings. Easy to install and remove, helpful to protect the sound hole. Mahogany wood material with beautiful hollow pattern, a great decoration to your guitar. Soft foam covers the insert edge, no damage to your guitar. Specifications: Material: Mahogany + foam Compatible Sound Hole Size: Dia 10cm / 3.9in Item Size: 10.5 * 0.9cm / 4.1 * 0.4in Item Weight: 25g / 0.9oz Note: 1.This sound hole cover is not suitable for guitars whose fretboard has reached the sound hole. 2.The back plate of the sound hole cover is removable. With the back plate, the sound hole cover works as a silencer; without the back plate, the sound hole cover is a good decoration to your guitar. If the back plate often falls off when it works as a silencer, you can use a little double side tape to fix it. 3.The guitar showed in the picture is not included. Package List: 1 * Sound Hole Cover