Features: brand new and high quality The sound hole cover is mainly made of high quality material, eco-friendly, strong & durable for long service for time. The acoustic guitar sound cover can eliminate unwanted feedback and enhance stage volume. The sound hole cover requires no modification to the instrument. Helpful to protect the sound hole. Guitar sound hole cover is convenient to store and use. Installation and removal are simple. The guitar sound cover fits for folk and classical guitar with electric box or built-in pickup. Specifications: Material: Rubber Color: Black Size Optional: S(86mm)/L(100mm)/XL(102mm) Size: As The Picture Shows Package Includes: 1Pc x Guitar Sound Hole Cover note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!