2Pcs Guitar Sound Hole Cover Rubber Feedback Buffer Sound Stop Hole Cover for 38/39/41/42 Inch Acoustic Guitar 10+11CmSoft rubber case edge installation and ensures no damage to the guitar. Easy to install and disassemble, no tools or special installation. Soundhole Guitar Cover Fits 38/39 40/41 Inch Acoustic Guitar. No modification of the instrument required. Eliminate feedback and increase the volume of the scene. It is a useful tool for guitar lovers. Size: 10+11cm Material: RubberColor: Black Package Contents: 2*Sound Hole CoverOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.