What's in the box:

Black Acoustic Classic Guitar Anti-howling Sound Hole Cover Soundhole Rubber Screeching Halt Feedback Buster Prevention Mute for 41"/42" (L) (L)

This is a soundhole cover that allowa you to cut out feedback while playing an electric acoustic guitar. A special tapered contour allows for a tight, custom fit without endless adjustments.

Features:
Eliminate feedback and enhance stage volume.
Soft rubber inserts safely into guitar's sound hole.
Quick and easy to install and remove.
Requires no modification to the instrument.
Tapered design allows greater fit to a variety of guitars.

Specifications:
Color: black
Main material: silicone
Size optional: S, L, XL(optional)
Thick: 12mm
Diameter:
S: 90 * 86mm / 3.54 * 3.39in
L: 104 * 100mm / 4.09 * 3.94in
XL: 105 * 102mm / 4.13 * 4.02in
Package size: 110 * 110 * 20mm / 4.33 * 4.33 * 0.79in
Item weight:
S: 45g / 1.59ounces
L: 59g / 2.08ounces
XL: 60g / 2.12ounces
Package weight:
S: 47g / 1.66ounces
L: 61g / 2.15ounces
XL: 62g / 2.19ounces

Package List:
1 * Sound Hole Cover