Features: Made of high quality silicone material, soft and durable, eco-friendly. Slightly flexible, easy to install, soft material makes it not easy to damage. Well designed for acoustic guitar, this is a weak guitar bag, preventing whistle. With this tool, to make you guitar music better sound quality, prevent noise. It can also prevent dust from getting into the guitar bag, keeping it clean. A great and essential addition to your guitar's excellent performance. Specifications:Material: SiliconeColor: BlackType: Guitar Soundhole CoverSuitable for: 38-39 & 40-41 inch guitarsSize Chart:Small:60g/2.1oz8.6x8.6x1.3cm/3.4x3.4x0.5inLarge:80g/2.8oz10x10x1.3cm/3.9x3.9x0.5inPackage:1 x Guitar Soundhole CoverNote:1. Please allow 1-2mm error due to manual measurement. Make sure you don't mind before bidding.2. Due to the different light, angle and display taken by the camera, the picture may not reflect the actual color of the subject.3. Thank you for your understanding.