【Material】The guitar sound hole cover is made of high-quality rubber material, which will not damage the surface of the guitar and will not break easily. 【Function】The soundhole cover can reduce the resonance of speakers, eliminate unnecessary echoes, and achieve better sound quality. 【Dust Proof】The weak sound buffer plug can also prevent dust from falling into the guitar case and keep it clean. 【Advantages】The guitar accessory is small and light, easy to carry, and easy to install and disassemble. 【Application】The instrument accessory is suitable for acoustic guitar with a hole diameter of 3.94in/10cm. It is a good helper to improve the sound quality.