FBR2 Feed Backbuster for Acoustic/Electric Guitars

FBR2 Feed Backbuster for Acoustic/Electric Guitars Feedback Buster reduces feedback for an Acoustic/Electric guitar. Insert Feedback Buster into your guitar's sound hole while using the pickup system and it reduces unwanted feedback, allowing greater sound control. Fits all standard size sound holes. 100mm in diameter. (M18ACFBB)