Level Logo & Mount – The Foundation for Your Custom Acoustic Guitar Feedback Buster This product contains two parts: a Level Logos Mount and a Stock Level Logo Design. The Level Logos Mount is necessary for installing Level Logos in your acoustic guitar’s sound hole. Our Patented Mount Design takes less than a minute to install and allows you to easily swap out different designs in just seconds — perfect for players who want to eliminate feedback and change up their look! Note: Before purchasing, make sure your guitar’s sound hole is between 3.75" and 4.25" in diameter to ensure compatibility. Features: Fast and Simple Installation: Install without removing strings — less than a minute required. See our Quick Install Video. Swappable Designs: Swap out Level Logos in seconds, giving you freedom to change your look on a whim. Compatible with Most Acoustic Guitars: Works with sound holes between 3.75" and 4.25". Eliminate Feedback: Say "Goodbye" to feedback! Level Logos are the best looking feedback buster on the market. One-Time Mount Install: Once you install a Mount, you can leave it in your acoustic. There's no need to remove the Mount while swapping Level Logos.