[Safety and Environmental Protection]The sound insulation board is made of high quality material, non-toxic and formaldehyde-free, which has the great advantage of reducing and absorbing noise. Safe to and touch, safe for adults, children and pets! [Easy to Cut and Install]Easy to cut with a knife, you can create different styles of decorative wall art in your favorite space! The sound insulation mat is easy to install, -adhesive design, no tools or materials required for installation! This sound insulation wall panel has glue on the back, Just off the protective film and stick to walls, doors and ceilings [Fashionable Appearance]This sound panel is designed with a 45 Chamferin beveled edge, it can leave no space during installation, not only can reduce and unwanted echoes, waves, reverberation and fluttering echoes, also in decorative play a role in the surface of the wall. Please note that noise reduction panels are not hexagons, the side lengths of the are not the same. [Wide Applications] acoustic treatment, these acoustic wall panels are versatile and can be used in professional studios, rehearsal rooms, concert , podcasts, vocal booths, home studios, offices, and more. Other sounds can be made clearer by eliminating unwanted sounds using an absorbing panel. color:White Material:Polyester size:single side is 15cm long Package Contents: 18 x Sound absorbing panels(The color of the adhesive is random, and the specified color cannot be ) Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.