6pcs Guitar Sound Cover, Guitar Sound Hole Cover, Guitar Mute Feedback Sound Hole Cover for 38 39 40 41 Inch Acoustic Guitar[2 Sizes Fit for Guitar] These Black Rubber Guitar Sound Hole Cover S has 2 different sizes, and Guitar Acupuncture Cover diameter 10cm is suitable for use in 40/41 Inch Guitar; Diameter length 8.6 cm Sound Guitar cover hole suitable for 38/39 inch guitar. [High Quality] These Black Guitar Sound Hole Covers are made of high-quality rubber, strong and reliable, smooth, not easy to break, can serve you for a long time, effectively prevent whistling, and at the same time help you keep your unique guitar clean. [Easy to install and use] The guitar hole covers are very easy to install and dismantle, just put them on the sound holes, easy to install, not easy to fall off, convenient, save time, it's your daily use and stage guitar. [Practical Features] The guitar sound hole cover is designed to cover the sound holes on the guitar to reduce unnecessary echoes or feedback, and avoid dust such as dust on the guitar without being affected by guitar enthusiasts or guitarists. [Intimate and practical gift] you can bring the sound guitar hole cover as a gift for your family, friends, colleagues and others such as playing guitar. This will indicate that you care about them, share those holes on the guitar, and your relationship will be promoted. Colour: BlackMaterial: RubberContent