Self-adhesive Design make the installation more easier. You 't need to buy extra taps or spray for the sound proof panels for walls. Saving your money and time. Made of Polyurethane, better sound insulation than other sound proof foam panels padding. Our sound absorbing panels are flame-retardant, odorless, formaldehyde free, non-toxic, ncorrosion resistant, and fade resistant. hexagonal honeycomb with beveled edge design both practical and decorative. DIY your unique wall decor with 6 different noise dampening panels. Acoustic Foam Easy to cut with a sharp knife. Easy to install without drilling holes or buy extra tapes, just and stick. Perfect sound proofing padding for wall and ceiling. It is a good choice for recording studios, podcasting, vocal booths, home studios to reduce Improve recording quality. Also can be used for offices, home theaters, game rooms, man caves, dog kennels. note: Backing are randomly colored. Cannot be chosen the specific color. Size: 17.5cm long on one side Material: Polyurethane Colour: silver gray Package Contents: 12 x Acoustic Panels Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.