Genuine Ernie Ball 9630 Acoustic Sound Hole Cover, 3-3/8" (8.6 cm)

Acoustic guitar sound hole cover that fits sound holes with a diameter of 3-3/8 inches (approximately 85.7 mm). It suppresses unwanted noise and feedback, maximizing the output of your acoustic-electric guitar. The durable rubber material is soft and won't scratch the surface of your guitar. It can be easily installed without any tools.